Template:Olsson & Caster, 1935
- Olsson, A.A. & Caster, K.E. 1935. Occurrence of Baculites Ovatus Zone of Upper Alberta Shales in Southeastern British Columbia: Geological Notes. Bulletin of the American Association of Petroleum Geologists 19(2): 295–299. DOI: 10.1306/3D932CEE-16B1-11D7-8645000102C1865D