00988nam0-22003251i-450-99000200040040332120040429101259.0000200040FED01000200040(Aleph)000200040FED0100020004020030910d1947----km-y0itay50------baengUSy---a---001yyModern methods and materials for teaching scienceElwood D. Heiss, Ellsworth S. Obourn, C. Wesley HoffmannNew YorkMacMillan & Co.1947347 p.22 cmScienzeInsegnamentoMetodologie502.8Heiss,Elwood D.84437Hoffman,C. Wesley84438Obourn,Ellsworth S.84439ITUNINARICAUNIMARCBK99000200040040332161 I A.3/0041043DAGENDAGENModern methods and materials for teaching science403236UNINA