TY  - BOOK
AU  - CHENG, T. C.
TI  - Symbiosis: organisma living together
SN  - 0 85226 115 2
U1  - ZOO 574.524 
PY  - 1971///
CY  - New Delhi
PB  - Wiley Eastern
KW  -  ECOLOGY
KW  - SYMBIOSIS
ER  -