Silverstein, Alvin <br/><br/>
Digestive system : how living creatures use food 
Alvin Silverstein and Virginia B. Silverstein;  illustrated by Mel Erikkson 
 - Englewood Cliffs,N.J.  Prentice-Hall  c1970 
 - 74p.: ill.; 22cm. 
<br/><br/><label>Dewey Class. No.: </label>591.132  / SIL