Howland, John L. <br/><br/>
A mathematical approach to biology / 
John L. Howland, Charles A. Grobe, Jr. 
 - Estados Unidos :  Heath and company,  1972. 
 - viii, 96 p. :  il. ;  21 cm. 
<br/><br/><label>ISBN: </label>0669752754 
<br/><br/><label>Dewey Class. No.: </label>xxxx  / xxxx