TY  - RPRT
TI  - Multi-stage sampling of forest resources by using space photography
AU  - Aldrich, R. C.
AU  - Heller, R. C.
AU  - Langley, P. G.
PY  - 1969
UR  - https://ntrs.nasa.gov/citations/19710002503
ID  - 19710002503
ER  -