Blough, Glenn Orlando. <br/><br/>
Making and using classroom science materials in the elementary school  apparatus, demonstrations, equipment, experiments. 
Glenn O. Blough and Marjorie H. Campbell. Illustrated by John J. O'Rourke. 
 - New York  Holt, Rinehart and Winston  1954. 
 - 229 p.  illus.  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching (Primary)<br/>Scientific apparatus and instruments.