Notkin, Jerome J. and Gulkin, Sidney <br/><br/>
The how and why wonder book of machines 

 - New York  ; Wonder Books  , 1969 
 - 48p. 
<br/><br/><label>ISBN: </label> 3.75 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering<br/>Machine Engineering<br/>Mechanical Engineering
<br/><br/><label>Dewey Class. No.: </label>621.8  / NOT