Butler, J. D. <br/><br/>
Hydroponics as a hobby  : growing plants without soil 

 - Urbana :  University of Illinois. College of Agriculture,  1962 
 - 16 p.  : ilus. 
 - Circular CIASE  ; 844 .
 - Circular CIASE  ; 844 .
<br/><br/> Fotocopia 
<br/><br/><label>LCCN: </label>26278 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hidroponía.<br/>Soluciones nutritivas.