Leslie, Stephen. "Upper Middle Ordovician conodont biofacies and lithofacies distribution patterns in eastern north America and northwestern Europe : evaluations using the Deicke, Millbrig and Kinnekulle K-bentonite Beds as Time Planes /." Doctoral dissertation, Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487864485229301Chicago Manual of Style (17th edition)