Colorado national guard. Armory "USA '75 The First 200 Years" will open free to the public September 1.3 at Colorado National Guard Armory 300 Logan Street for a month, RMN S 4, 1975 p.69 Major exhibit, "USA The First Two Hundred Years," opens at Colorado National Guard Armory, 300 Logan. Post S 14, 1975 p.3 Feature on structure. RMN Ag 25, 1985 p.34 40