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1.- Methods and instrumentation for the investigation of groundwater systems Congreso - Methods and instrumentation for the investigation of Groundwater Systems (1983. Noordwijkerhout, Países Bajos) La Haya: the Nethelands Organization for applied Scientific Research, 1983 Aguas; I / 8 - 7 - 40Ver registro 2.- Methods and instrumentation for the investigation of groundwater systems = Methodes et materiel permettant de rechercher des systems d'eaux souterraines. Proceedings international symposium. Noordwijkerhout-the Netherlands, May,1983 Asociación Internacional de Hidrogeólogos, org.; Congreso - Methods and instrumentation for the investigation of Groundwater Systems (1983. Noordwijkerhout, Países Bajos) [S.l.]: UNESCO TNO, 1983 I / 15 - 8 - 23Ver registro