00450nam a2200157Ia 4500001001000000003000500010008004100015010001100056040000900067100001800076245004700094260005000141300000900191440005900200650003300259Para_3469CHAP220125s1925 xx 000 0 und d a202034 cCHAP aGuyton, T. L. aGreenhouse fumigation /c by T. L. Guyton aHarrisburg, Pa :b Department of Agriculture a8 p. aPennsylvania. Dept. of Agriculture General, Bull.; 413 aInvernaderos x FumigacioĢn