TY - RPRT TI - Investigation of the groundwater system at Masaya Caldera, Nicaragua, using transient electromagnetics and numerical simulation AU - R.E. MacNeil AU - W. E. Sanford AU - C.B. Connor AU - S.K. Sandberg AU - M. Diez PY - 2007 DO - 10.1016/j.jvolgeores.2007.07.016 UR - https://pubs.usgs.gov/publication/70031376 ID - 70031376 ER -