TY  - RPRT
TI  - Methods for segment wheat area estimation
AU  - Heydorn, R. P.
AU  - Trichel, M. C.
AU  - Erickson, J. D.
PY  - 1979
UR  - https://ntrs.nasa.gov/citations/19800007231
ID  - 19800007231
ER  -