Notkin, Jerome J.      <br/><br/>
Machines 
 How and why wonder books of Machines. 
Jerome J. Notkin and Sidney Gulkin; Illustrated by George J. Zaffo 
 - New York  Grosset & Dunlap,  1960 
 - 48 p. 
 - The how and why wonder book of . <br/><br/><label>Subjects--Topical Terms: </label><br/>Machines--how things work
<br/><br/><label>Dewey Class. No.: </label>j621 Not   26