TY  - GEN
AU  - Sharma, P. D.
TI  - Elements of ecology
SN  - 81-7133-035-5 :
U1  - 574.5 
PY  - 1988///-89
CY  - Meerut
PB  - Rastogi publications
KW  - ECOLOGY
N1  - Includes references and index
ER  -