Broad, David Stephen.2009-03-232009-03-2319691969Source: Masters Abstracts International, Volume: 40-07, page: .http://hdl.handle.net/10393/7272http://dx.doi.org/10.20381/ruor-11696Biology, General.Lower Devonian Heterostraci from the Peel Sound formation, Prince of Wales Island, Northwest Territories.Thesis