TY  - BOOK
AU  - Tiwari, Prem Sagar Nath
TI  - Paryavarniya manovigyan
U1  - 155.9 hP0;3 
PY  - 2000///
CY  - Delhi
PB  - MotiLal Banarasidas
KW  - Business. Communication.Reports
ER  -