Hayden, F.V. Preliminary report of the United States geological survey of Wyoming and portions of contiguous territories (being a second annual report of progress) / conducted under the authority of the secretary of the interior by F.V. Hayden; F.V. Hayden .— : Government printing office, 1871 .— 512 с. — Lang: eng .— URL: https://rucont.ru/efd/88414 (дата обращения: 06.08.2024)