TY - RPRT TI - Helicopter electromagnetic and magnetic survey data and maps, Seco Creek area, Medina and Uvalde counties, Texas AU - Bruce D. Smith AU - David V. Smith AU - Patricia L. Hill AU - Victor F. Labson PY - 2003 DO - 10.3133/ofr03226 UR - https://pubs.usgs.gov/publication/ofr03226 ID - ofr03226 ER -