00537nam a22002057a 4500003000500000005001700005008004100022010001000063011001000073035001000083040000900093100002000102245005100122260005400173300002900227500001400256650001800270650002100288700002200309CHAP20220329140357.0971013s                r     00010     d  a51124  a52096  a56246  cCHAP00aWalker, John N.  aEstimating greenhouse ventilation requirements  aLexington, Ken :bUniversity of Kentucky,c(197?)  a4 h.b: ilus. ; gráfs.  aFotocopia14aInvernaderos.14aRefrigeración.0 aDuncan, George A.