TY  - BOOK
AU  - Tiwari, S.C..
TI  - Modern eology / 
SN  - 81-211-0088-7
U1  - G:5 
CY  - Dehra Dun : 
PB  - Bishen Singh Mahendra Pal Singh.
KW  - Biology <Geography > <ecology>
ER  -