00428nam a2200109Ia 4500082002100000100006300021245018000084260003000264300001400294500000500308700000500313  a382.061bUn58.OE  aUnited Nations Conference on Trade and Development, Geneva  aOperation and effects of the generalized system of preferences, selected studies submitted at the 5th session of the special committee on preferences Geneva 3-13 April, 1973b  aNew YorkbThe Auth.c1974  avi, 230p.  a  a