References

1. Vreeland, Robert H., Nature’s Bridges and Arches, Volume 1 – General Information, self-published, 1976, 2nd Edition, 1994.
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   Note: In addition to Volume 1 listed above, the following volumes have been published. All were limited editions and are out of print.
   
   Volume 2: Arches National Park (1977)
   Volume 3: Central Canyonlands National Park (1987)
   Volume 4: Outskirts of Canyonlands National Park (1995)
   Volume 5: Vicinity of Moab, Utah (1976)
   Volume 6: Escalante River Basin, Utah (1977)
   Volume 7: Lake Powell, Utah and Arizona (1976)
   Volume 8: Southern Utah (1986)
   Volume 9: South Central Utah (1982)
   Volume 10: Monument Valley, Arizona (1979)
   Volume 11: Eastern Arizona (1979)
   Volume 12: Central and Western Arizona (1979)
   Volume 13: East Coast (VT, NY, PA, VA, FL) (1976)
   Volume 14: Midwest (MI, OH, IN, IL, WI, IA, MO) (1976)
   Volume 17: Southwest (OK, TX, NM) (1992)
   Volume 18: Colorado (1982)
   Volume 20: Far West (WA, OR, NV) (1983)
   Volume 21: California (1979)
   Volume 23: Additions (1990)
   
   The following volume was published only as a xeroxed edition, with very poor quality photos. Only 30 copies were made:
   Volume 19: North (SD, WY, MT, ID) (1988)
   
   The following volumes were never published:
   Volume 15: Red River Gorge of Kentucky
   Volume 16: Remainder of Kentucky
   Volume 22: Grand Canyon, Arizona
   Volume 24: South (TN, AL, AR)
   Volume 25: More Additions
   
   
2. Stevens, Dale J. and McCarrick, J. Edward, The Arches of Arches National Park, self-published, 1988.
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   Two Supplements were also published. The three volumes catalog a total of 1893 arches within the borders of Arches National Park.
   
   
3. Barnes, F. A., Canyon Country Arches and Bridges, self-published, 1987.
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