00689nam a2200193Ia 4500001001000000003000500010008004100015010001100056040000900067082002100076100001600097245016700113260007500280300000900355440004700364650002300411650004200434700001900476Para_3720CHAP220125s1942    xx            000 0 und d  a202300  cCHAP  aPA-C 632.951 S67  aBoyce, A. M  aResistance of Citrus thoips to tartaremetic in the San Fernando valley and a tentative substitute program for emergency conditions  /c A. M. Boyce, C. O. Persing  aBerkeley, Calif.  :b University of California. College of Agriculture  a2 h.  aCalifornia. Agr. Exp. Sta. News letter; 21  aDDT (insecticida)   aFertilizantes x Efecto en cítricos  aPersing, C. O.