Wren, R. C. <br/><br/>
Potter's new cyclopaedia of botanical drugs and preparations / 
R. C. Wren ; foreword by T. E. Walls 
 - London :  Health Science Press,  1956 
 - xii, 400 p. ;  24 cm. 
<br/><br/><label>ISBN: </label>0850320097 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Medical plants
<br/><br/><label>National Library of Medicine Call No.: </label>QV766