Vermont, USA

References:
- Hitchcock, Edward; Hager, Albert D.; Hitchcock, Edward, Jr., and Hitchcock, Charles H. (1861): Report On The Geology Of Vermont: Descriptive, Theoretical, Economical, And Scenographical. 2 Volumes, Claremont Manufacturing Co., Claremont, New Hampshire, 988 pp.
- Morrill, P. and Chaffee, R. G. (1957): Vermont mines and mineral localities. Part I – Southern Vermont, Hanover, 43 pp.
- Morrill, P. and Chaffee, R. G. (1964): Vermont mines and mineral localities. Part II, 54 pp.
- Grant, R. W. (1968): Mineral collecting in Vermont. Special publication No. 2, Vermont Geological Survey, 49 pp.
- Van Diver, B. B. (1987): Roadside Geology Of Vermont And New Hampshire. Missoula, 230 pp.
- Peterson, E. U., Ed. (1993): Selected Mineral Deposits Of Vermont And The Adirondack Mountains Of New York. Society of Economic Geologists Guidebook Series Volume 17, Ft. Collins, 1993, 73 pp.

- http://www.anr.state.vt.us/DEC/GEO/vgs.htm