TY - RPRT TI - Methods for determination of radioactive substances in water and fluvial sediments AU - Leland Lincoln Thatcher AU - Victor J. Janzer AU - Kenneth W. Edwards PY - 1977 DO - 10.3133/twri05a5 UR - https://pubs.usgs.gov/publication/twri05A5 ID - twri05A5 ER -