This SOHO is running by myself. I'm graduated from University of Gadjahmada, Yogyakarta in geology and became hydrogeologist by practices, which I did since 1972

I involved in groundwater management in Java, when I joined with Directorate of Environmental Geology until October 1997.

As a member of International Association of Hydrogeologists since 1979, I wrote some papers which were presented in some international meetings hosted by or sponsored by association.

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