1. Baadsgaard, H., S. S. Goldich, A. O. Nier, and J. H. Hoffman: The reproducibility of A-40/K-40 determinations. Trans. Am. Geophys. Union 38, 539 (1957).
2. Billings, M. P.: The geology of New Hampshire, Pt. II: Bedrock geology. Concord, New Hampshire Plann. Devel. Comm. 1956.
3. Brookins, D. G.: Rb-Sr geochronological investigations in the Middle Haddam and Glastonbury quadrangles, Connecticut. Ph. D. Thesis, Mass. Inst. Tech. 1963.
4. ?: Some Rb-Sr aspects of the genesis of large granitic pegmatites in areas of regional metamorphism. Trans. Kansas Acad. Sci. 68, 305?310 (1965).
5. - H. W. Fairbairn, P. M. Hurley, and W. H. Pinson: Geochronological aspects of the genesis of large granitic pegmatites in non-igneous environments. Geol. Soc. Am. Annual Meeting, 25 (1967).