TY  - BOOK
AU  - Kumar,Arvind
AU  - 
TI  - A textbook of environmental science. 
SN  - 81 7648 589 6
U1  - 628/K95t 
PY  - 0000///APH Pub.
PY  - 2016///
CY  - New Delhi. 
KW  - Environmental Science.
KW  - Environment
N1  - Includes index and bibliography.
ER  -