TY - RPRT TI - Digital Data from the Great Sand Dunes and Poncha Springs Aeromagnetic Surveys, South-Central Colorado AU - B. J. Drenth AU - V. J. S. Grauch AU - Viki Bankey AU - Ltd. New Sense Geophysics PY - 2009 DO - 10.3133/ofr20091089 UR - https://pubs.usgs.gov/publication/ofr20091089 ID - ofr20091089 ER -