TY - RPRT TI - The use of vertical seismic profiles in seismic investigations of the earth AU - Alfred H. Balch AU - Myung W. Lee AU - J. J. Miller AU - Robert T. Ryder PY - 1982 DO - 10.1190/1.1441357 UR - https://pubs.usgs.gov/publication/70188674 ID - 70188674 ER -