- Author: Parker Paul
- Language: English
- Year: 2012
- Author: Parker Paul
- Language: English
- Year: 2009
- Author: Ostertag Rhonda, Ostertag George
- Language: English
- Year: 2003
- Author: Smith Mac, Hahn Jennifer Petersen
- Language: English
- Year: 2010
- Author: Nelson Dan A
- Language: English
- Year: 2015
- Author: Nelson Dan A., Bauer Alan
- Language: English
- Year: 2008
- Author: Nelson Dan A
- Language: English
- Year: 2015
- Author: National Ski Patrol System (U.S.)
- Language: English
- Year: 2012
- Author: Mountaineers (Society)
- Language: English
- Year: 2017
