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Cedar Creek laboratory, Minnesota
Comments on Conant's Recommendations: Curriculum I by Nelson Bossing, Professor of Education, and Francis Gamelin, assistant superintendent, Independent School District 218
Parr calorimeter
Parr calorimeter
Roy G. Francis, "A Social Scientists Looks at the Humanities"
Wiley mill
Wiley mill
Wiley mill
Wiley mill
Wiley mill