TY - RPRT TI - Preliminary report on seismic-reflection studies of crustal structure in the western, central, and southern United States AU - J. C. Roller AU - O.P. Strozier AU - W. H. Jackson AU - J. H. Healy PY - 1963 DO - 10.3133/70039537 UR - https://pubs.usgs.gov/publication/70039537 ID - 70039537 ER -