TY  - GEN
AU  - Guha Bakshi, D.N.
AU  - Sen, Subir
AU  - Bandyopadhyay, Samar Kumar
TI  - A textbook of environmental science: for degree course
U1  - 375.0083 
PY  - 2001///, r2011
CY  - Kolkata
PB  - Calcutta Book
KW  - ENVIRONMENTAL SCIENCES
ER  -