1. CSIR-National Geophysical Research Institute, Hyderabad, India
2. Academy of Scientific and Innovative Research, Ghaziabad, India
3. Geodetic and Research Branch, Survey of India, Dehradun, India
4. Department of Basic and Social Sc., College of Forestry, Ranichauri (VSG Uttarakhand University of Horticulture and Forestry, Bharsar), Tehri Garhwal, India