Roadside Geology Series (1976–2009)
- Roadside Geology of Northern California (1976)
- Roadside Geology of New York (1985)
- Roadside Geology of the Yellowstone Country (1985)
- Roadside Geology of Montana (1986)
- Roadside Geology of Virginia (1986)
- Roadside Geology of New Mexico (1987)
- Roadside Geology of Alaska (1988)
- Roadside Geology of Idaho (1989)
- Roadside Geology of Utah (1990)
- Roadside Geology of Texas (1991)
- Roadside Geology of Wyoming (1991)
- Roadside Geology of Hawaii (1996)
- Roadside Geology of South Dakota (1996)
- Roadside Geology of Maine (1998)
- Roadside Geology of Indiana (1999)
- Roadside Geology of Massachusetts (2003)
- Roadside Geology of Northern and Central California (2003)
- Roadside Geology of Ohio (2006)
- Roadside Geology of Minnesota (2009)