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| Rocks & Minerals (1990) 65:304 Meyers, T.R., Stewart, G.W. (1956) The Geology of New Hampshire - Part III: Minerals and Mines. New Hampshire Department of Resources and Economic Development. |
| Williams, Howel, Turner, Francis J., Gilbert, Charles M. (1954) Petrography - An Introduction to the Study of Rocks in Thin Sections. W. H. Freeman and Company, San Francisco, CA. |
| Rice, Jack M., Dickey, John S. Jr., and Lyons, John B. (1971): Skeletal Crystallization of Pseudobrookite (American Mineralogist 56:158-162.) |
| Hitchcock, Charles Henry (1905). The Geology of Littleton, New Hampshire (Cambridge MA: University Press). |
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