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Allsopp, W.H.L., 1960 The manatee: ecology and use for weed control. Nature, Lond., 188(4752):762

Allsopp, W.H.L., 1961 Putting manatees to work. New Sci., 12(263):548–9

Bennett, F.D., 1974 6.3. Biological control. In Aquatic vegetation and its use and control, edited by D.S. Mitchell. Paris, Unesco, pp.99–106

Benton, A.R. Jr. and R.M. Newman, 1976 Colour aerial photography for aquatic plant monitoring. J.Aquat.Plant Mange., 14:14–6

Bertram, G.C.L. and C.K.R. Bertram, 1962 Manatees of Guiana. Nature, Lond., 196(4861):1329

Choy, T.L. and R.M. Deveraj, 1958 A study of comparative feeding methods on local pigs. J.Malay Vet.Assoc., 2:49–57

Davis, C.C., 1970 The importance of higher aquatic plants as food for animals. Ecology, 51:1112–4 (Review of N.S. Gaevskaya, 1966)

Edwards, R.W. and M.W. Brown, 1960 Aerial photographic method for studying distribution of aquatic macrophytes in shallow water. J.Ecol., 48(1):161–3

Fischer, H. and C. Devendra, 1963 Origin and performance of local swine in Malaya. Paper presented to the FAO Meeting on pig diseases and production, Singapore. Working paper 15

Gaevskaya, N.S., 1966 The role of higher aquatic plants in the nutrition of animals of fresh-water basins. Moscow, Nauka, 3 vols. Transl. from the Russian by D.G. Maitland Muller, edited by K.H. Mann. Boston Spa, Yorkshire, National Lending Library for Science and Technology, 3 vols:629 p. (1969) (Reviewed by C.C. Davis in Ecology, 51(6):1112–4 (1970))

Gaudet, J.J., 1974 2. The normal role of vegetation in water. In Aquatic vegetation and its use and control, edited by D.S. Mitchell. Paris, Unesco, pp.24–37

Gupta, O.P. and P.S. Lamba, 1976 Some aspects of utilization of aquatic weeds. In Aquatic weeds in South East Asia, edited by C.K. Varshney and J. Rzoska. Proceedings of a Regional Seminar on noxious aquatic vegetation, New Delhi, 12–17 December, 1973. The Hague, Dr. W. Junk B.V., pp. 361–8

Hughes, H.R., 1976 Research into aquatic weeds in New Zealand waterways: a review. Inf. Ser.Dep.Sci.Ind.Res.N.Z., (116)

Jagadesh, K.M. and C.S. Lakshminarayana, 1971 Eradication and utilization of water hyacinth; a review - an addition. Curr.Sci, 40(7):148–9

Little, E.C.S., 1967 Progress report on transpiration of some tropical water weeds. PANS (C), 13(2):127–32

Nair, K.K., 1968 A preliminary bibliography of the grass carp (Ctenopharyngodon idella) Valenciennes. FAO Fish.Circ., (302):16 p.

Penfound, W.T. and T.T. Earle, 1948 The biology of the water hyacinth. Ecol.Monogr., 18:447–72

Pieterse, A.H., 1974 The water hyacinth. Review article,Trop.Abstr., 29(2):77–92

Pieterse, A.H., 1978 The water hyacinth (Eichhornia crassipes); a review. Abstr.Trop.Agric., 4(2):9–42

*Pirie, N.W., 1968 The present position of research on the use of water hyacinth (Eichhornia crassipes) December 1967. A note. In Handbook of utilization of aquatic plants, edited by E.C.S. Little. Rome, FAO, Plant Production and Protection Division, PL:CP/20:7–8

Ramachandran, V., T. Ramaprabhu and P.V.G.K. Reddy, 1971 Eradication and utilization of water hyacinth. Curr.Sci., 40(14):367–8

Rudescu, L., C. Niculescu and I.P. Chivu, 1965 Monografia stufului den delta Dunarii. (Monograph on reeds in the delta of the Danube) Bucharest Academy of the Socialist Republic of Romania, 542 p. (in Romanian). Issued also as Arch. Hydrobiol.(Suppl.), 30(2):80–111 (1965)

Scheutte, H.A. and H. Alder, 1927 Notes on the chemical composition of some of the larger aquatic plants of Lake Mendota. 2. Vallisneria and Potamogeton. Trans.Wis. Acad.Sci.Arts Lett., 23:249–54

Scheutte, H.A. and A.E. Hoffman, 1921 Notes on the chemical composition of some of the larger aquatic plants of Lake Mendota. 1. Cladophora and Myriophyllum. Trans.Wis. Acad.Sci.Arts Lett., 20:529–31

Seidel, K., 1967 Wasserpflanzen reinigen Abwässer. (Aquatic plants purify sewage) Umschau, 67(17):565 (in German)

Seidel, K., 1971 Macrophytes as functional elements in the biology of man. Hidrobiologia, Bucuresti, 12:121–30

Sharma, A., 1971 Eradication and utilization of water hyacinth - a review. Curr.Sci., 40(3):51–5

Shell, E.W., 1962 Herbivorous fish to control Pithophora sp. and other aquatic weeds in ponds. Weeds, 10(6):326–7

Shirley, R.L., J.F. Easley and J.F. Hentges, 1974 Toxic substances and chemical composition of hyacinths and other water plants. Annu.Res.Rep.Inst.Food Agric.Sci.Univ. Fla., 1974:110–1 (Abstr.)

Springell, P.H. and J.D. Blake, 1975 Water hyacinth problems in the Fitzroy region of Central Queensland. Hyacinth Control J., 13:3–5

Timmons, F.L., 1971 Assessment of losses by aquatic and bank weeds. In Crop loss assessment methods. Pt. 3.2.3, of Handbook on estimating of financial losses in field crops by bank aquatic weeds causing water losses in irrigation ditches and ponds. Rome, FAO, Acc.No.: 14510–70–WS

U.S. Agency for International Development, 1971 Economic damage caused by aquatic weeds. Washington, D.C., National Technical Information Service, PB-206–905

Van Vuran, J.P.J., 1948 Soil fertility and sewage. New York, Dover Publications Inc., 326 p.

Woodham, H.E., 1954 Rations for livestock. Bull.Minist.Agric.Fish.Food G.B., (48):150 p.

Woodman, H.E., R.E. Evans and D.B. Norman, 1933 Nutritive value of lucerne: yield, composition and nutritive value. J.Agric.Sci., 23:419–58

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