TY  - BK
AU  - King,A.J.
AU  - Jrbr,E.H.
TI  - Experiment in pre-harvest sampling of wheat fields
T2  - Research Bulletin (Agricultural Experiment Station)
PY  - 1940///
CY  - Ames, IA (USA)
PB  - Agric. Exp. Station, Iowa State College of Agriculture, 
ER  -