TY  - BOOK
AU  - Markandey,  D. K. 
AU  - Markandey, N. R
TI  - Our environment Vol. 1& 2
AV  - QH546.M3  2006 
PY  - 2006///
CY  - New Delhi
PB  - A. P. H. Publisher 
KW  - Adaptation  (Biology)
KW  - Environment
ER  -