Denver: National Park Service, 1980. Paperback. xii, 431, 377p., text reproduced from keyboard-set ms, illustrated with a number of folded line maps and architectural specs, massive softbounds in 11x8.5 inch plain printed wraps. The matte coverstock bears one cup-ring and two ownership signatures, entirely clean and unmarked within, bindings sound, a very good set (it's a pale cupring). Author emphasizes that hers is a 'civil' history, but military use and occupation of the area does intrude.