Wren, R.C. <br/><br/>
Potter's new cyclopaedia of botanical drugs and preparations/ 
R.C. Wren; edited by R.W. Wren; forward by T.E. Wallis 
 - 7th ed. 
 - London:  Sir ISAAC Pitman,  1956 
 - xv, 400 p.:  ill.;  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label> £ 5.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pharmacognosy<br/>Drugs<br/>Materia medica, vegetbale<br/>Pharmacopoeias
<br/><br/><label>Dewey Class. No.: </label>615.3203