Balaram, V. and Patil, M. L. and Agrawal, A. K. and Charan, S. N. and Satyanarayanan, M. and Mathur , Ramavati and Kapilavastu , K. and Sarma , D. S. and Gowda, M. Sankara and Ramesh , S. L. and Sangurmath, P. and Anjaiah , K. V. and Dasaram, B. and Saxena, R. K. and Begum, Zahida (2006) Preparation and certification of high-grade gold geochemical reference material. Accreditation and Quality Assurance, 11 (7). pp. 329-335. ISSN 0949-1775