TY - RPRT TI - Map showing structure of the continental terrace in the Port Isabel 1 degree x 2 degrees quadrangle, Texas AU - H. L. Berryhill AU - A. R. Trippet PY - 1980 DO - 10.3133/i1254f UR - https://pubs.usgs.gov/publication/i1254F ID - i1254F ER -