
- Author: Oran R. Young, Frank Biermann
- Language: English
- Year: 2010

- Author: Richard D. Margerum
- Language: English
- Year: 2011

- Author: John A. Volpe National Transportation Systems Center, National Park Service, National Academy of Engineering, Steve Olson, Proctor Reid
- Language: English
- Year: 2013

- Author: John Echeverria, Donald Connors, Ray Eby, Grant Ferrier, Suzanne Iudicello, Jack Archer, Mary Ann Glendon, Carl Safina, Thomas Eisner, Michael Bliss
- Language: English
- Year: 1995

- Author: George R. Fried
- Language: English
- Year: 2010

- Author: Donald F. Kettl, et al.
- Language: English
- Year: 2001