00815cas a2200265 a 4500 1624772 BD-DhUL 20170417194215.0 810206d 1951 fr uu p i0 a0eng 72623132 1624772 LC eng LC LC BD-DhUL engfre lc QA11.A1 N38 502 UNI UNESCO International conference on science abstracting : convened by the United Nations Educational, Scientific, and Cultural Organization, in Paris, from 20 to 25 June 1949 : final report / UNESCO Unesco : United Nations; 1951. 194 p. ; ill. ; 27 cm. English and French. Science Teaching of basic sciences ddc REF 184049 184049 0 0 ddc 0 502_000000000000000_UNI 1 REF 320224 DUL DUL UNC 2017-04-17 Gift 502 UNI A1880 2017-04-17 2017-04-17 REF