TY  - BOOK
AU  - Manoharachary, C.
AU  - Reddy, P. Jayarama
TI  - Principles of environmental studies
SN  - 8178000695
U1  - 363.7 
PY  - 2004///
CY  - Hyderabad
PB  - BS Pub.
KW  - Nature study; Human ecology - Study and teaching
ER  -