International Organization for Standardization (ISO). 2013. ISO 3166 Country Codes. [Cited 1 November 2020]. https://www.iso.org/iso-3166-country-codes.html
United Nations. Standard Country or Area Codes for Statistical Use (M49 standard). Statistical Services Branch, Statistics Division. New York, UN. [Cited 1 November 2020]. https://unstats.un.org/unsd/methodology/m49/
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Selected combinations of gear and effort (former ANNEX N.I)
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