Yates, Martin G., and Frank H. Howd. “Contact Metamorphism of the Black Hawk Zn-Pb-Cu Deposit, Hancock County, Maine”. Atlantic Geoscience 24, no. 3 (December 1, 1988). Accessed April 24, 2024. https://journals.lib.unb.ca/index.php/ag/article/view/1656.