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USA | |
| Dana, Arnold Guyot (1885) On the Gahnite of Rowe, Massachusetts. American Journal of Science, 3rd series, Art. LVIII, p. 455-456. |
| Chute, Newton E. (1969) The talc, soapstone, and asbestos deposits of Massachusetts USGS Open-File Report 69-39, p. 8-10. |
| Chute, Newton E. (1969) The talc, soapstone, and asbestos deposits of Massachusetts USGS Open-File Report 69-39, p. 8-10. |
| Chute, Newton E. (1969) The talc, soapstone, and asbestos deposits of Massachusetts USGS Open-File Report 69-39, p. 8-10. |
| Waters, Rev.W. (1917) History of Chelmsford Massachusetts. |
| Steve Stillman (1995). |