Note 1 — HISTORICAL
Reading edition
Ancient Ruins in Southwestern Colorado. Rept. U.S. Geol. Surv. Terr. (Hayden Survey) for 1874, Washington, 1876.
Reading edition
Ancient Ruins in Southwestern Colorado. Rept. U.S. Geol. Surv. Terr. (Hayden Survey) for 1874, Washington, 1876.