00528nam a2200169Ia 4500001001000000003000500010008004100015010001100056040000900067100001900076245008700095260004600182300001000228440004900238650005500287700001600342Para_5267CHAP220125s1920    xx            000 0 und d  a203739  cCHAP  aJohnson, Elmer  aDusting machinery for cotton boll weevil control  /c Elmer Johnson and B. R. Coad  aWashington  :b Department of Agriculture  a31 p.  aEUA. Dept. of Agriculture Farmers'bull; 1098  aAspersores  Control de plagas  Anthonomus grandis.  aCoad, B. R.