00564nam a2200169Ia 4500001001000000003000500010008004100015010001100056040000900067100001700076245011600093260005700209300002100266440004300287650004600330700001800376Para_3983CHAP220125s1922    xx            000 0 und d  a202426  cCHAP  aStakman,E. C  aThe determination of biologic forms of Puccinia graminis on Torticum Spp  /c By E. C. Stakman and M. N. Levine  aSt. Paul, Minnesota  :b The University of Minnesota  a10 p. : gráfs.  aMinnesota Agr. Exp. Sta. Tech. Bull; 8  aPuccinia graminis tritici  Roya del trigo  aLevine, M. N.