1. Fossils from the Ordovician bioherm at Meiklejohn Peak, Nevada Author/Creator: Ross, Reuben James, 1918- author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1972 Resource Type: Book Access & Availability: Loading
2. Fossils in Ordovician tuffs, northeastern Maine Author/Creator: Neuman, Robert B., 1920- author Publication/Creation: Washington, D.C. : United States Department of the Interior, Geological Survey, 1964 Resource Type: Book Access & Availability: Loading