00891nam a2200241Ia 4500 85721 BIBL 20160527203817.0 750519s1963 xx 000 0 eng u 63023589 (OCoLC)01344827 ORL m.c. PUXA LB1585 .Z24 372.35 Zafforoni, Joseph 191634 Local New developments in elementary school science. Report of a study by Joseph Zafforoni, with editorial assistance by Edith Selberg. Washington National Science Teachers Association [c1963] 52 p. diagrs. 23 cm. "Based on a study conducted by a comittee of the National Science Teachers Association." Science Study and teaching (Elementary) 166868 Local National Science Teachers Association. cn 141443 Local 69659 69659 0 0 0 372_350000000000000_Z17 0 evl 366173 10 10 1 2016-05-27 136280 0 372.35 Z17 80000000585607 2016-05-27 00:00:00 r:85721 z:NCC:D 6