1. Bimodal Silurian and Lower Devonian volcanic rock assemblages in the Machias-Eastport area, Maine Author/Creator: Gates, Olcott, 1919- author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1981 Resource Type: Book Access & Availability: Loading
2. Bimodal Silurian and Lower Devonian volcanic rock assemblages in the Machias-Eastport area, Maine Author/Creator: Gates, Olcott, 1919-1999 Publication/Creation: Washington : U.S. Govt. Print. Off, 1981 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 1182-1185. Access & Availability: Loading