11. The Crinoidea of Anticosti Island, Québec (late Ordovician to early Silurian) Author/Creator: Ausich, William I. 1952- (William Irl) Publication/Creation: Calgary : Canadian Society of Petroleum Geologists, [2010] Resource Type: Book Access & Availability: Loading
12. Cross sections of Lower Ordovician carbonate depositional lithofacies and Mississippi Valley-type zinc-and iron-sulfide mineralization in the Caulfield district, east-central part of Harrison 1⁰ x 2⁰ quadrangle, Arkansas and Missouri Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading