TY  - RPRT
TI  - Aeromagnetic map of Montana: In color
AU  - Isidore Zietz
AU  - F. P. Gilbert
AU  - S. L. Snyder
PY  - 1980
DO  - 10.3133/gp934
UR  - https://pubs.usgs.gov/publication/gp934
ID  - gp934
ER  -