Boothroyd, Jennifer  1972 <br/><br/>
What floats? What sinks?  a look at density 
Jennifer Boothroyd 
 - [s.l.]  Lerner Publications  2011 
 - 32 p. 
 - Lightning bolt books. Exploring physical science .
 - Lightning bolt books. Exploring physical science .
<br/><br/><label>ISBN: </label>9780761354338 (lib. bdg. : alk. paper) 9780761360551 (pbk. : alk. paper) 
<br/><br/><label>Dewey Class. No.: </label>AP Nursery 532