00503nam a2200157Ia 4500001001000000003000500010008004100015010001100056040000900067100001700076245007200093260007200165300001000237440005300247650004500300Para_4238CHAP220125s1920    xx            000 0 und d  a202557  cCHAP  aDutton, W. C  aDusting and spraying experiments of 1918 and 1919  /c W. C. Dutton  aEast Lansing, Michigan  :b Agricultural College Experiment Station  a50 p.  aMichigan. Agr. Coll. Exp. Sta. special Bull; 102  aAspersión  Calcio x Efecto en plantas