- Author: Timothy R. Walton, Bernd Kaussler, Jonathan R. Alger, Pia Antolic-Piper, Anamaria Berea, Steven L. Burg, Bob de Graaff, Frances Flannery, William Hawk, John Hulsey
- Language: English
- Year: 2014
- Author: Timothy R. Walton
- Language: English
- Year: 2015