00662nam a2200169Ia 4500001000700000003000500007005001700012008004100029100003400070245019100104260004700295300001600342490003600358500002000394500002600414650005200440118698BIBL20160527184754.0930525m19551947ilua          0001| spa  1 aParker, Bertha Morris.2Local10aTreescby Bertha Morris Parker ; checked for scientific accuracy by Wilbur R. Mattoon ; Kodachrome not credited by R. D. Bezucha ; drawings by Olga Kucera ; Kodachrome cover by Gay Lord.  aEvanston, Ill.bRow, Petersonc1955c1947.  a35 p.bill. 0aBasic science education series.  a"Intermediate".  aRow Peterson unitext. 0aSciencexStudy and teaching (Elementary)2Local