Lund & Grogan 1997. Cochliodonts from the Mississippian Bear Gulch Limestone (Heath Formation; Big Snowy Group; Chesterian) of Montana and the relationships of the Holocephali. Dinofest International: proceedings of a symposium held at Arizona State University., Academy of Natural Sciences, Philadelphia, 1997: i-ix, 1-587. Chapter pagination: 477-492