Hutchinson, John. <br/><br/>
Key to the families of flowering plants of the world 

 - Oxford :  Clarendon Press,  1967 
 - 117 p.  : ilus. 
<br/><br/> "... Supplement to The genera of flowering plants." 
<br/><br/><label>LCCN: </label>17786 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botánica--Clasificación.
<br/><br/><label>Dewey Class. No.: </label>582.13  / 8