TY  - GEN
AU  - Chattopadhyay, Asimkr
AU  - Chattopadhyay, Arunkr
TI  - Vyavaharik Pranividya
U1  - 591 
PY  - 1998///
CY  - kolkata
PB  - Nimala Library
KW  - ZOO
ER  -