Ritchason, Jack <br/><br/>
La pequeña enciclopedia de hierbas revisada / 
Jack Ritchason 
 - Utah :  Woodland Books,  1984       
 - ix, 159 p. 
<br/><br/><label>ISBN: </label>0913923001 
<br/><br/><label>LC Class. No.: </label>R QK 99 R598p 1984