Citation: Ncm. Drees et al., LITHOLOGY, BIOSTRATIGRAPHY AND GEOCHEMISTRY OF THE UPPER DEVONIAN GRAMINIA FORMATION, CENTRAL ALBERTA, Bulletin of Canadian petroleum geology, 46(2), 1998, pp. 148-165
Citation: Ncm. Drees et Di. Johnston, FAMENNIAN AND TOURNAISIAN BIOSTRATIGRAPHY OF THE BIG VALLEY, EXSHAW AND BAKKEN FORMATIONS, SOUTHEASTERN ALBERTA AND SOUTHWESTERN SASKATCHEWAN, Bulletin of Canadian petroleum geology, 44(4), 1996, pp. 683-694
Citation: Ncm. Drees et Di. Johnston, TYPE SECTION AND CONODONT BIOSTRATIGRAPHY OF THE UPPER DEVONIAN PALLISER FORMATION, SOUTHWESTERN ALBERTA, Bulletin of Canadian petroleum geology, 42(1), 1994, pp. 55-62
Citation: Di. Johnston et Ncm. Drees, UPPER DEVONIAN CONODONTS IN WEST CENTRAL ALBERTA AND ADJACENT BRITISH-COLUMBIA, Bulletin of Canadian petroleum geology, 41(2), 1993, pp. 139-149