Verlag: Michael D. Yandell/National Parks Division of World-Wide Research and Publishing, Casper, Wyoming, 1976
Anbieter: Between the Covers-Rare Books, Inc. ABAA, Gloucester City, NJ, USA
Softcover. Zustand: Fine. Revised edition. Volume two only. Quarto. Stapled wrappers. Bottom corners creased, else fine. A photographic and comprehensive guide.