Walker, John N. <br/><br/>
An automatic sidewall system for greenhouse environmental control 

 - (Lexington) :  University of Kentucky. College of Agriculture Cooperative Extension Service,  (198?) 
 - 5 p.  : ilus. 
<br/><br/> Fotocopia 
<br/><br/><label>LCCN: </label>51120 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invernaderos.