Esbensen, Barbara Juster,  <br/><br/>
Sponges are skeletons 

 - 32 pages :   colour illustrations ;   20 cm 
 - Let's-read-find-out-science .
 - Let's-read-find-out-science .
<br/><br/> Stage 2 
<br/><br/><label>ISBN: </label>0064451844 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Readers
<br/><br/><label>Dewey Class. No.: </label>428.6