https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Chopra%2C%20P.N.%20.%22&format=rss 7 0 50 ISBN:81-85017-32-8 https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=17719 By Chopra, P.N. .. New Delhi : Interprint , 1986 . 424p. ; 23cm.. 81-85017-32-8

]]> https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=17719 ISBN: https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=20984 By Chopra, P.N. .. Kolkata : Macmillan India Ltd. , 1974 . vii,419p. ; 21cm..

]]> https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=20984 ISBN: https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=27954 By Chopra, P.N. .. New Delhi : Kalyani Publisher , 1988 . viii,722p. ; 22cm..

]]> https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=27954 ISBN: https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=29170 By Chopra, P.N. .. Guwahati : Publication board Assam , 1968 . 84p. ; 22cm..

]]> https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=29170 ISBN: https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=37945 By Chopra, P.N. .. Kolkata : Macmillan India Ltd. , . 3v.;325p. : 22cm ..

]]> https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=37945 ISBN: https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=37971 By Chopra, P.N... New Delhi : Sterling Publishers , 2003 . xiii,391p. : 22cm ..

]]> https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=37971 ISBN: https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=53922 By Chopra, P N .. Jalandhar : Vishal Publications , 1974 . 212pg ; 20cm..

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