TY  - RPRT
TI  - Generalized slope map of the Big Fork-Avon environmental study area, Flathead, Lake, Missoula, and Powell counties, Montana
AU  - I. J. Witkind
AU  - J.M. Boyles
AU  - Penny E. Patterson
PY  - 1979
DO  - 10.3133/i1130
UR  - https://pubs.usgs.gov/publication/i1130
ID  - i1130
ER  -