Topham

LEMMON, D.M., UNPUBLISHED DATA.LEMMON, D.M., AND TWETO, O.L., 1962, TUNGSTEN IN THE U.S., USGS MAP, MR-25.HITCHCOCK, C.H., 1861, MAINE BOARD OF AGRICULTURE, 6TH ANN. REPT., P.146-328.Lemmon, D.M. And Tweto, O.L., Tungsten In The United States, Exclusive Of Alaska And Hawaii: U.S. Geological Survey Mineral Investigations Resource Map Mr-25, Scale 1:3,168,000.Lemmon, D.M. And Tweto, O.L., Tungsten In The United States, Exclusive Of Alaska And Hawaii: U.S. Geological Survey Mineral Investigations Resource Map Mr-25, Scale 1:3,168,000.Hitchcock, C.H., 1861, General Report Upon The Geology Of Maine: In Preliminary Report On Natural History And Geology, Maine Board Of Agriculture 6th Annual Report, P. 146-328.Hitchcock, C.H., 1861, General Report Upon The Geology Of Maine: In Preliminary Report On Natural History And Geology, Maine Board Of Agriculture 6th Annual Report, P. 146-328.