http://library.bids.org.bd/cgi-bin/koha/opac-search.pl?q=ccl=su%3A%22United%20Nations%22%20and%20au%3AUnited%20Nations%20and%20se%3A%5BDocument%5D%20%20United%20Nations&format=rss2 3 0 500 ISBN http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=50647 New York : United Nations (UN) , 1980 . vi, 45p. : , At head of title: Department of International Economic and Social Affairs. | United Nations publication. Sales no. E.80.II.A.4. 23 cm..

]]> http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=50647 ISBN http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=52247 New York : United Nations (UN) , 1982 . xii, 97p. ; 21 cm..

]]> http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=52247 ISBN http://library.bids.org.bd/cgi-bin/koha/opac-detail.pl?biblionumber=53234 New York : United Nations Economic Commission for Africa (UNECA) , 1980 . Series : 30 cm. .

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