00609nam a2200181Ia 4500001001000000003000500010008004100015010001100056040000900067100002100076245014100097260004600238300001000284440003700294650005900331700001800390700001900408Para_5364CHAP220125s1933    xx            000 0 und d  a203880  cCHAP  aBlanchard, R. A.  aBurning for the control of aphids on alfalfa in the Antelope valley of California  /c by R. A. Blanchard, H. B. Walker and O. K. Hedden  aWashington  :b Department of Agriculture  a24 p.  aEUA. Dep. of Agri. Circular' 287  aQuema de tierras  Control de plagas  Alfalfa x Plagas  aHedden, O. K.  aWalker, H. B.