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	1.	Modern science and your child, by William J. Gruver and Albert Piltz, specialists, science, Instructional Resources Branch. by United States. Office of Education. Division of State Grants Gruver, William John, 1914- Piltz, Albert, 1915- Material type: Text; Format: print ; Literary form: Not fiction Publication details: [Washington, U.S. Dept. of Health, Education, and Welfare, Office of Education; for sale by the Supt. of Documents, U.S. Govt. Print. Off., 1963] Availability: No items available. Add to cart (remove)
	2.	Science equipment and materials : science kits, by Albert Piltz and William J. Gruver. by Piltz, Albert, 1915- Gruver, William John, 1914- [joint author.] Material type: Text; Format: print ; Literary form: Not fiction Publication details: [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] Availability: No items available. Add to cart (remove)

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