https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Popper%2CKarl%2C%22&format=rss 5 0 50 ISBN: https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=26339 By Popper, Karl R. .. New York : Science Editions, INC. , 1961 . 474p. ; 22cm..

]]> https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=26339 ISBN:0-415-27842-2 https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=51804 By Popper, Karl .. N.York : Routledge , 2006 . 470 ; 0-415-27842-2

]]> https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=51804 ISBN:0-415-23731-9 https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=51805 By Popper, Karl .. N.York : Routledge , 2006 . 403 ; 0-415-23731-9

]]> https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=51805 ISBN: https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=51900 By Popper, Karl .. London : Routledge , 2002 . 156pg ; 17cm..

]]> https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=51900 ISBN:9780415278447 https://opac.cottonuniversity.ac.in/cgi-bin/koha/opac-detail.pl?biblionumber=58520 New York Routledge and Kegan Paul 2002 . 513pg: 19cm.. 9780415278447

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