Harris, Dudley A. <br/><br/>
Hydroponics  the complete guide to  gardening without soil :  a practical handbook for beginners hobbyists and commercial growers 
Dudley Harris 
 - London :  New Holland Publishers,  !992 
 - 232 p. :   ill. ;   21 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>1853681938 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydroponics