Template:Norford et al., 1995
- Norford, B.S., Nowlan, G.S., Bolton, T.E., Elias, R.J., Jin, J., Johnston, P.A. & Rohr, D.M. 1995. Biostratigraphy of the Advance Formation, a new upper Middle Ordovician unit, northern Rocky Mountains, British Columbia. Society of Economic Paleontologists and Mineralogists, Pacific Section, Book 77, 85–88.