cam a22 2 4500 282780971 CHVBK 20200623173918.0 130818s1923 xxu m 00 eng (NEBIS)003483738 (VAUD)991019906389702852 (IDSBB)003759200 (RNV)001230721-41bculausa_network (RERO)001230721 1348244 (EXLNZ-41BCULAUSA_NETWORK)991007209439702851 SzZuIDS BS/BE B460 SzZuIDS NEBIS ZBZ s1pe rero s2ss rero Collings Ellsworth An experiment with a project curriculum by Ellsworth Collings New York (N.Y.) MacMillan 1923 346 S. Diss. phil. Columbia University Hochschulschrift gnd-content BK020300 XK020000 XK020000 BK020000 XK020000 XK020000 1 Hochschulschrift = Thèse/Mémoire MedeaZBZ SWK idszbz ZR VAUD bcud bcud TVA 39396 810010047 NEBIS Z01 Z0SBI ZBIND CG 715 IDSBB B400 B400 400Q6 BeM BEW 25.2/95 app NEBIS 100 1- Collings Ellsworth VAUD 100 1- Collings Ellsworth aut IDSBB 100 1- Collings Ellsworth