Authors: Birkle, P Merkel, B Portugal, E Torres-Alvarado, IS

Citation: P. Birkle et al., The origin of reservoir fluids in the geothermal field of Los Azufres, Mexico - isotopical and hydrological indications, APPL GEOCH, 16(14), 2001, pp. 1595-1610

Authors: Portugal, E Birkle, P Barragan, RM Arellano, VM Tello, E Tello, M

Citation: E. Portugal et al., Hydrochemical-isotopic and hydrogeological conceptual model of the Las Tres Virgenes geothermal field, Baja California Sur, Mexico, J VOLCANOL, 101(3-4), 2000, pp. 223-244

Authors: Barragan, RM Arellano, VM Birkle, P Portugal, E Diaz, G

Citation: Rm. Barragan et al., Chemical description of spring waters from the Tutupaca and Rio Calientes (Peru) geothermal zones, INT J ENERG, 23(2), 1999, pp. 125-139