1. Department of Geology University of Kerala Thiruvananthapuram India
2. Central Ground Water Board Thiruvananthapuram India
3. Department of Geology University College Thiruvananthapuram India
4. Department of Earth Sciences School of Earth Science and Resources, China University of Geosciences Beijing China
5. Department of Earth Sciences University of Adelaide Adelaide South Australia Australia
6. Department of Geological and Mining Engineering and Sciences Michigan Technological University Houghton Michigan USA