Blough, Glenn Orlando. <br/><br/>
Making and using classroom science materials in the elementary school :  apparatus, demonstrations, equipment, experiments / 
by Glenn O. Blough and Marjorie H. Campbell ; illustrated by John J. O'Rourke. 
 - New York :  Holt, Rinehart and Winston,  [1954] 
<br/><br/>Bibliography: p. [196]-206. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science -- Study and teaching (Primary)--Science -- Study and teaching (Primary)<br/>Scientific apparatus and instruments.