Groundwater recharge in the Azul aquifer, central Buenos Aires Province, Argentina Varni, M. ; Usunoff, E. ; Weinzettel, P. ; Rivas, R. Abstract Publication: Physics and Chemistry of the Earth B Pub Date: March 1999 DOI: 10.1016/S1464-1909(99)00012-X Bibcode: 1999PCEB...24..349V