00506nam a22001457a 4500003000800000005001700008008004100025040002100066082001300087110001900100245017700119260003700296300001000333650001700343BD-DhUL20170418161520.0170418s1971    nyua|||| |||| 00| 0 eng c  aBD-DhULcBD-DhUL  a677bUNR2 aUnited Nations20aReport of the permanent group on synthetics & substitutes on its fifth session. Trade & Development Board Official records, 11th session Supplement No. 4A /cUnited Nations  aNew York :bUnited Nationsc1971  a23 p. 4aManufactures