Walke, Rajpal and Wadhwa, N. K. (2011) Usage of electronic journals at National Physical Laboratory (India): A Case Study. In: Impact of Information Technology on College Libraries, 14-15 October, 2011, Jalgaon (M.S.), India.

Walke, Rajpal and Wadhwa, N. K. (2010) Collection Development in National Physical Laboratory, Library: A Case Study. In: Emerging Technologies And Changing Dimensions Of Libraries And Information Services. N.A., pp. 709-714. ISBN 9788190799911

Walke, Rajpal and Wadhwa, N. K. and Tewari, D. K. (2009) Impact of digital environment of library users: A case study of NPL. In: Shaping the Future of Special Libraries Beyond Boundaries. Ane Books, New Delhi, India, pp. 93-102. ISBN 9788180521539

Wadhwa, N. K. and Tewari, D. K. and Walke, Rajpal and Yadav, A. K. and Dhawan, S. M. (2008) Bibliometric Analysis of NPL Papers Published during 1981 –1985 and 2001 – 2005 : Case Study. In: Fourth International Conference on Webometrics, Informetrics, and Scientometrics & Ninth COLLNET Meeting , 28 July - 1 August 2008, Berlin.

Walke, Rajpal and Tewari, D. K. and Wadhwa, N. K. and P., Nishy (2007) Use of Electronic Resources by NPL(India) Researchers: A Survey. In: Fifty Third All India Library Conference, December 13-16, 2007, Hyderabad, Andhra Pradesh, India.

Walke, Rajpal and Tewari, D. K. and Wadhwa, N. K. and Tanwar, Sangita (2003) Electronic publishing and access to scientific journals: The role of the library and the librarian. In: Impact of Information Management & Services on CSIR Research Community & Its Libraries, August 25-27, 2003, National Botanical Research Institute, Lucknow (India).