1. The Groundhog coal field, British Columbia;Buckham;Geol. Surv. Can. Bull.,1950
2. Coalification levels and their significance in the Groundhog Coal field, north-central British Columbia;Bustin;Int. J. Coal Geol.,1984
3. Groundhog Coal field, central British Columbia, reconnaissance stratigraphy and structure;Bustin;Bull. Can. Pet. Geol.,1983
4. Stephenson, R. and Mckenzie, K., in press. Stratigraphy and depositional environments of the Sustut Group, southeastern Sustut Basin, north-central British Columbia. Bull. Can. Pet. Geol.
5. Coal petrology, its principles, methods and applications, second edition;Bustin;Geol. Assoc. Can., Short Course Notes,1985