00563cam a22001937a 4500003000500000005001700005008004100022010001000063011001000073035001000083040000900093100002000102245007000122260010500192300001800297500001400315650001800329700002200347CHAP20220329140357.0971013s                r     00010     d  a51120  a52092  a56242  cCHAP00aWalker, John N.13aAn automatic sidewall system for greenhouse environmental control  a(Lexington) :bUniversity of Kentucky. College of Agriculture Cooperative Extension Service,c(198?)  a5 p.b: ilus.  aFotocopia14aInvernaderos.0 aDuncan, George A.