TY  - BOOK
AU  - Singh,H.H.
TI  - Geography and environment: issues and challenges 
U1  - 301.31 
PY  - 1986///
CY  - New Delhi
PB  - Concept Pub.
KW  - Kayastha, S. L.
KW  - Human ecology
KW  - India
KW  - Environmental protection
KW  - Environmental geography
N1  - Includes index
ER  -