Lenz 1961. Devonian Rugose Corals of the Lower Mackenzie Valley, Northwest Territories Geology of the Arctic (ed. G. O. Raasch) 1 1961., Geology of the Arctic (ed. G. O. Raasch) 1 1961 500-514 pls. I, 2. Proc. 1st internal. Symp. Arctic Geol. (Alberta Soc. Petrol. Geol.), Univ. Toronto Press.", 1961: Unpaginated. Chapter pagination: Unpaginated