TY  - BOOK
AU  - HERBERT SCHILDT
TI  - PRINCIPLES OF COMMNICATION SYSTEM 2ND ED
PY  - 1991///
CY  - NEW DELHI
PB  - TATA MCGEAW HALL , PUBLISHING CP- LTD, 43/7 WEST PATELI NAGAR NEW DELHI 111 0008
ER  -