Ruchlis, Hyman. <br/><br/>
Orbit:  a picture story of force and motion. 
Drawings by Alice Hirsh. 
 - New York,  Harper  [1958] 
 - 147 p.  illus.  24 cm. 
<br/><br/><label>Subjects--Index Terms: </label>Force and energy--Juvenile literature  Motion--Juvenile literature  Force and energy  Motion 
<br/><br/><label>Dewey Class. No.: </label>530  / RUC