TY - RPRT TI - High-Resolution Aeromagnetic Survey To Image Shallow Faults, Poncha Springs and Vicinity, Chaffee County, Colorado AU - V. J. S. Grauch AU - Benjamin J. Drenth PY - 2009 DO - 10.3133/ofr20091156 UR - https://pubs.usgs.gov/publication/ofr20091156 ID - ofr20091156 ER -