Douglas, J. Sholto  1920- <br/><br/>
Advanced guide to hydroponics :  (soiless cultivation) / 
James Sholto Douglas 
 - New ed. 
 - London :  Pelham,  1985 
 - 368 p. :  ill. ;  22 cm. 
<br/><br/>Bibliography: p362. - Includes indexes 
<br/><br/><label>ISBN: </label>0720715717 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydroponics