TY  - BOOK
AU  - Thomas,G B B  .
AU  - Thomas,M F S  .
TI  - Biology functional systematic and environmental / 
SN  - 0717507599
U1  - 570 
PY  - 1978///
CY  - Kolkata : 
PB  - Hulton educational publication , 
KW  - BIOLOGY
N1  - Includes index
ER  -