TY  - BOOK
AU  - Singh, R.P.
AU  - Sapre, S.D.,
TI  - Communication systems: analog & digital 
SN  - 9780070634541
PY  - 2007///
KW  - Telecommunication systems
KW  - sears
KW  - Digital communications
N1  - Includes bibliographical references and index
ER  -