Aquatic ecosystems /
Kumar, Arvind .
Aquatic ecosystems / Arvind Kumar. - New Delhi: A.P.H, 2003. - xi,437p.: ill.; 25 cm .
81-7648-454-7
577.6 KUM
Aquatic ecosystems / Arvind Kumar. - New Delhi: A.P.H, 2003. - xi,437p.: ill.; 25 cm .
81-7648-454-7
577.6 KUM