00898nam0-2200289---450-99000851375040332120071002162830.0000851375FED01000851375(Aleph)000851375FED0100085137520070522d1951----km-y0itay50------baengFRy-------001yyTrade barriers to knowledgea manual of regulations affecting educational, scientific and cultural materialsUNESCOParigiUNESCO1951167 p.24 cmUNESCO Pubblication847UNESCO<United Nations Educational, Scientific, and Cultural Organization>13162ITUNINARICAUNIMARCBK990008513750403321F1-F4.92374DECTSDECTSTrade barriers to knowledge732545UNINA