TY - RPRT TI - Bibliography of technical reports, articles, and memoranda published or otherwise released by the Ground Water Branch during the calendar year 1961 AU - M. S. Griffin AU - E.N. Clark PY - 1962 DO - 10.3133/ofr6256 UR - https://pubs.usgs.gov/publication/ofr6256 ID - ofr6256 ER -