00571nam a22001817a 4500 BD-DhUL 20170418141157.0 170418s1963 nyu||||| |||| 00| 0 eng BD-DhUL BD-DhUL BD-DhUL 621.31 UNP United Nations Proceedings of the seminar and study tour on electricity districution systems in urban areas / United Nations. New York : United Nations. 1963. 156 p.: 28 cm. include index and bibliography electricity ddc REF 184909 184909 0 0 ddc 0 621_310000000000000_UNP 1 REF 321104 DUL DUL UNC 2017-04-18 Gift 621.31 UNP D2466 2017-04-18 2017-04-18 REF