Sixth annual report of the United States geological survey of the territories, embracing portions of Montana, Indaho, Wyoming, and Utah; being a report of progress of the explorations for the year 1872. Воспроизведено в оригинальной авторской орфографии издания 1873 года (издательство "Washington. Governmemt printing office"). Это и многое другое вы найдете в книге Sixth annual report of the United States geological survey of the territories (F. V. Hayden)