TY  - RPRT
TI  - Land use/land cover and environmental photointerpretation keys
AU  - George L. Loelkes
AU  - G.E. Howard
AU  - E.I. Schwertz
AU  - P.D. Lampert
AU  - S.W. Miller
PY  - 1983
DO  - 10.3133/b1600
UR  - https://pubs.usgs.gov/publication/b1600
ID  - b1600
ER  -