Nelson, Alexander. <br/><br/>
Principles of agricultural botany 

 - London :  Thomas Nelson,  1946 
 - 556 p.  : ilus. 
<br/><br/><label>LCCN: </label>31762 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botánica económica.
<br/><br/><label>Dewey Class. No.: </label>581.6  / N45