The Didestive System/ 
by Margaret E. Smith, Dion G. Morton. 
 - Edinburgh:  Church-Hill Livingston,  2001. 
 - 237p.:  ill.;  28cm. 
<br/><br/><label>ISBN: </label>0443062455 
<br/><br/><label>LC Class. No.: </label>QP145   / .S65 2001