TY  - RPRT
TI  - Interpretive aeromagnetic map using the horizontal gradient: Lake City Caldera area, San Juan Mountains, Colorado
AU  - V.J. Grauch
PY  - 1987
DO  - 10.3133/gp974
UR  - https://pubs.usgs.gov/publication/gp974
ID  - gp974
ER  -