TY - RPRT TI - Oxygen, hydrogen, and helium isotopes for investigating groundwater systems of the Cape Verde Islands, West Africa AU - V.M. Heilweil AU - K.D. Solomon AU - S. B. Gingerich AU - Ingrid M. Verstraeten PY - 2009 DO - 10.1007/s10040-009-0434-2 UR - https://pubs.usgs.gov/publication/70036719 ID - 70036719 ER -