TY  - BK
AU  - Calpouzos,L.
AU  - Madson,M.E.
AU  - Martin,F.B.
AU  - Roelfs,A.P.
AU  - Welsh,J.R.
AU  - Wilcoxson,R.D.
TI  - A new model to measure yield losses caused by stem rust [Puccinnia graminis tritici] in spring wheat
U1  - 78-227301 
PY  - 1976///
KW  - Plant diseases
KW  - AGROVOC
KW  - Wheat triticum spp
N1  - Ref
ER  -