Hon, R., J. P. Fitzgerald, S. L. Sergent, W. D. Schwartz, J. Dostal, and J. D. Keppie. “Silurian-Early Devonian Mafic Rocks of the Piscataquis Volcanic Belt in Northern Maine”. Atlantic Geoscience 28, no. 2 (July 1, 1992). Accessed April 18, 2024. https://journals.lib.unb.ca/index.php/ag/article/view/1858.