TY - RPRT TI - Determination of bench-mark elevations at Bethel Island and vicinity, Contra Costa and San Joaquin counties, California, 1987 AU - J. C. Blodgett AU - M. E. Ikehara AU - William F. McCaffrey PY - 1988 DO - 10.3133/ofr88498 UR - https://pubs.usgs.gov/publication/ofr88498 ID - ofr88498 ER -