00590nam a2200181Ia 4500001001000000003000500010008004100015010001100056040000900067100001900076245013200095260005200227300001300279440003700292650004100329700001700370700002100387Para_4980CHAP220125s1900    xx            000 0 und d  a203439  cCHAP  aJohnson, W. G.  aSome important insecticides, fungicides and apparatus for their application  /c W. G. Johnson, C. O. Townsend, and H. P. Gould  aCollege Park  :b Maryland Agricultural College  ap. 55-89  aMaryland Agr. Exp. Sta. Bull; 65  aAspersores  Insecticidas  Fungicidas  aGould, H. P.  aTownsend, C. O.