TY - RPRT TI - Estimation of recharge rates to the sand and gravel aquifer using environmental tritium, Nantucket Island, Massachusetts AU - Jayne Fifield Knott AU - Julio C. Olimpio PY - 1986 DO - 10.3133/wsp2297 UR - https://pubs.usgs.gov/publication/wsp2297 ID - wsp2297 ER -