J.A. Gulland. (1975). Manual of Methods for fisheries Resource Survey and Appraisal part5- Objective s and Basic Methods. FAO of the United Nations.
Styl cytowania ChicagoJ.A. Gulland. Manual of Methods for Fisheries Resource Survey and Appraisal Part5- Objective S and Basic Methods. Rome: FAO of the United Nations, 1975.
Styl cytowania MLAJ.A. Gulland. Manual of Methods for Fisheries Resource Survey and Appraisal Part5- Objective S and Basic Methods. FAO of the United Nations, 1975.
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