Hayden, F.V. Sixth annual report of the United States Geological Survey of the Territories : embracing portions of Montana, Idaho, Wyoming, and Utah : being a report of progress of the explorations for the year 1872 / by F.V. Hayden , conducted under the authority of the Secretary of the Interior; F.V. Hayden .— : Government printing office, 1873 .— 915 с. — Lang: eng .— URL: https://rucont.ru/efd/117403 (дата обращения: 15.11.2025)