Gray, J. S. (1992). Manual of methods in aquatic environment research. Rome: FAO.
Trích dẫn kiểu ChicagoGray, John S. Manual of Methods in Aquatic Environment Research. Rome: FAO, 1992.
Deismireacht MLAGray, John S. Manual of Methods in Aquatic Environment Research. Rome: FAO, 1992.
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