http://www.granthalaya.org/cgi-bin/koha/opac-search.pl?q=ccl=%28su%3A%7BCOMMUNICATION%20SYSTEMS.%7D%29&sort_by=&format=rss 8 0 50 ISBN: http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=344459 By Miller,George A.
London:Penguin Books,1970 .
197p

]]> http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=344459 ISBN: http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=717389 By LATHI B.P..
WILEY EASTERN LIMITED, PUNE. 1968 .
45

]]> http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=717389 ISBN: http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=806199 By Lathi B.P..

]]> http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=806199 ISBN: http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=812994 By Kumar Prem Ghosh A.K..

]]> http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=812994 ISBN: http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=818796 By Carlson A. Bruce, Crilly Paul B., Rutledge Janet C..
McGraw Hill, Boston 2002 .
850

]]> http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=818796 ISBN: http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=820284 By Sarkar Subir Kumar.
S. Chand, New Delhi 2005 .
366

]]> http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=820284 ISBN: http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=833528 By Schilling Donald L..
Tata Mc.Graw hill Publiction Co. Ltd.

]]> http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=833528 ISBN: http://www.granthalaya.org/cgi-bin/koha/opac-detail.pl?biblionumber=833566 By George Kennedy.
Mc Graw hill booki co.

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