The new play areas :  their design and equipment / 
edited by George D. Butler 
 - New York :  A.S. Barnes,  1938 
 - xiii, 242 p. :  front, ill ;  27 cm. 
<br/><br/> Bibilography : p. 228-237 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Scientists--Biography
<br/><br/><label>Dewey Class. No.: </label>136