TY  - BOOK
AU  - Biswal, D
AU  - Rao,J.K
TI  - Commercial correspondence 
SN  - 81-7096-715-5
U1  - 383.122 
PY  - 1980///
CY  - Ludhiana
PB  - Kalyani
KW  - Letters
KW  - Postal communication
KW  - Commerce
ER  -