http://library.bids.org.bd/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Allen%2C%20R.%20G.%20D.%22&format=rss2 6 0 500 ISBN http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=25506 By | Allen, R.G.D.. London : | Macmillan , 1959 . | xiii, 812p. ; 22 cm..

]]> http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=25506 ISBN http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=25705 By | Allen, R.G.D.. London : Macmillan ; 1960 . xv, 548p.: 23 cm..

]]> http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=25705 ISBN http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=36218 By Allen, R. G .D.. New York : St. Martin's Press , 1962 . xii, 512p. : 18 cm. .

]]> http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=36218 ISBN http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=47781 New York : Wiley , 1953 . 448p. : 24 cm..

]]> http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=47781 ISBN http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=47786 By Allen, R. G. D.. London : Hutchinson's University Library , 1951 . 216p. : 19 cm..

]]> http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=47786 ISBN http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=48361 By Allen, R. G. D.. London : Macmillan , 1967 . xii, 420p. : 23 cm..

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