Niz, Ellen Sturm. <br/><br/>
Floating and sinking 
Ellen Sturm Niz 
 - ed. 
 - Minnesota  Capstone Press  2006 
 - 24 p. 
 - First facts. Our physical world .
 - First facts. Our physical world .
<br/><br/><label>ISBN: </label>9780736854016 (hardcover) 9780736869386 (pbk.) 
<br/><br/><label>Dewey Class. No.: </label>AP Nursery 532