text New York United Nations Burean of Social Affairs 1955 Ind v, 120 p.; 24 cm. v, 120 p.; 24 cm. UNITED Nations Burean of Social Affairs 301.15 301.15UNIs INLIS000000000010530 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)