TY  - BK
AU  - Stewart,D.M.
AU  - Christensen,J.J.
AU  - Cotter,R.U.
AU  - Roberts,B.J.
TI  - Physiologic races of "Puccinia graminis" in the United States in 1959
PY  - 1960///
CY  - St. Paul, MN (USA)
PB  - Minnesota Agricultural Experiment Station, 
ER  -