TY  - BOOK
AU  - Patanjali, Premchand
TI  - Sanchar sidhaant ki ruprekha
SN  - 8188075094
U1  - 302.2 PAT 
PY  - 2002///
CY  - Ghaziabad
PB  - K.L.Pachouri Prakashan
KW  - Mass media - India: Telecommunication
ER  -