00505nam a2200181Ia 4500001000900000003000500009008004100014010001100055040000900066100001500075245008400090260005900174300000900233410001900242650001700261700002200278700002300300Para_157CHAP220125s1984    xx            000 0 und d  a198675  cCHAP  aBlom, T.J.  aCarbon dioxide in greenhouses  /c by T.J. Blom, W.A. Straver and F.J. Ingratta  aOntario, Canada  :b Ministry of  Agriculture and Food  a4 p.  aFactsheet; 290  aInvernaderos  aI. Straver, W.A.   aII. Ingratta, F.J.