000			003210000a22001330004500
008			140223b1954 xxu||||| |||| 00| 0 eng d
041			_aENG
080			_a6a1:N5 J4
082			_a6a1:N5 J4
245			_aWorld of learning, 1954. Edn.5.
260			_aLondon _bEuropa Pub. _c1954
650			_aCONGRESSES
906			_aWORLD
999			_c248842 _d248842