science kits Piltz, Albert 1915- creator Gruver, William John 1914- joint author. text xx Washington] U.S.Dept. of Health, Education, and Welfare, Office of Education ; [for sale by the Superintendent of Documents, U.S. Govt. Print. Off. 1963] 1963 monographic eng

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v, 26 p. : tables. by Albert Piltz and William J. Gruver. "OE-29049." Copies 1 and 3 with: Education in Czechoslovakia / Nellie Apanasewicz. Washington : U.S.Dept. of Health, Education, and Welfare, Office of Education, 1963. Bound together subsequent to publication. DLC Bibliography : p.26. Science Study and teaching Teaching Aids and devices L111 .A6 1963, no. 30 hew64000012 U.S.Dept. of Health, Education and Welfare. Library 771205 20260227111513.0 hew64000012