http://www.opac.lib.esn.ac.lk/cgi-bin/koha/opac-search.pl?q=ccl=an%3A590&sort_by=acqdate_dsc&format=rss 2 0 50 ISBN:9788173711848 http://www.opac.lib.esn.ac.lk/cgi-bin/koha/opac-detail.pl?biblionumber=90089 By SPANGENBURG, Ray .
London University Press 1995 .
xm, 134p. 9788173711848

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]]> http://www.opac.lib.esn.ac.lk/cgi-bin/koha/opac-detail.pl?biblionumber=90089 ISBN:0-7821-2523-9 http://www.opac.lib.esn.ac.lk/cgi-bin/koha/opac-detail.pl?biblionumber=51793 By RAY, Deborah.S..
San Francisco Sybex Inc. 1999 .
xvii, 873p. 0-7821-2523-9

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