A notice of the ancient remains of southwestern Colorado examined during the summer of 1875 / By W. H. Holmes.; A notice of the ancient ruins in Arizona and Utah lying about the Rio San Juan / By W. H. Jackson; The human remains found near the ancient ruins of southwestern Colorado and New Mexico / By Emil Bessels. ; Bulletin of the United States Geological and Geographical Survey of the Territories. vol. 2, no. 1.; Geological and Geographical Survey of the Territories (U.S.).; Jackson, William Henry, 1843-1942. A notice of the ancient ruins in Arizona and Utah lying about the Rio San Juan.; Bessels, Emil, 1847-1888. The human remains found near the ancient ruins of southwestern Colorado and New Mexico.; A notice of the ancient ruins in Arizona and Utah lying about the Rio San Juan.; The human remains found near the ancient ruins of southwestern Colorado and New Mexico.; United States Geological and Geographical Survey of the Territories.