References
- Behre, C. H. Jr. 1933: Talus behavior above timber in the Rocky Mountains. J. Geol., 41: 622–635.
- Bryan, Kirk 1934: Geomorphic processes at high altitudes. Geogr. Rev., 24: 655–656.
- Daly, R. A. 1912: Geology of the North America Cordillera at the forty-ninth parallel. Can. Geol. Sur. Mem., 38(2): 593.