Gopal Chandra De. (1989). Fundamentals of agronomy. Oxford & IBH publishing Co.
Čikaški stil citiranjaGopal Chandra De. Fundamentals of Agronomy. New Delhi: Oxford & IBH publishing Co, 1989.
MLA način citiranjaGopal Chandra De. Fundamentals of Agronomy. Oxford & IBH publishing Co, 1989.
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