The Conway Granite of New Hampshire as a Major Low-Grade Thorium Resource Adams, J. A. S. ; Kline, M. -C. ; Richardson, K. A. ; Rogers, J. J. W. Abstract Publication: Proceedings of the National Academy of Science Pub Date: November 1962 DOI: 10.1073/pnas.48.11.1898 Bibcode: 1962PNAS...48.1898A