TY - RPRT TI - Transcontinental geophysical survey (35°-39° N) seismic refraction profiles of the crust and upper mantle from 87° to 100° W longitude AU - D. H. Warren PY - 1968 DO - 10.3133/i534d UR - https://pubs.usgs.gov/publication/i534D ID - i534D ER -