00517nam a22001937a 4500003000500000005001700005008004100022010001000063011001000073035001000083040000900093100002000102245002600122260010200148300001900250500001400269650001800283700002200301CHAP20220329140358.0971013s                r     00010     d  a51131  a52103  a56253  cCHAP00aWalker, John N.  aGreenhouse structures  aLexington :bUniversity of Kentycky College of Agriculture Cooperative Extension Service,c(198?)  a11 p.b: ilus.  aFotocopia14aInvernaderos.0 aDuncan, George A.