Description of the Hydrarchos harlani: (Koch,)... A gigantic fossil reptile: lately discovered by the author in the state of Alabama, March, 1845. Together with some geological observations made on different formations of the rocks, during a geological tour through the eastern, western, and southern parts of the United States in the years 1844-1845. By Doctor Albert C. Koch 2nd ed.

Chicago citation style
Koch, Albert C. Description of the Hydrarchos harlani: (Koch,)... A gigantic fossil reptile: lately discovered by the author in the state of Alabama, March, 1845. Together with some geological observations made on different formations of the rocks, during a geological tour through the eastern, western, and southern parts of the United States in the years 1844-1845. By Doctor Albert C. Koch 2nd ed.. Retrieved from the Digital Public Library of America, https://archive.org/details/descriptionofhyd00koch. (Accessed September 19, 2018.)
APA citation style
Koch, Albert C, Description of the Hydrarchos harlani: (Koch,)... A gigantic fossil reptile: lately discovered by the author in the state of Alabama, March, 1845. Together with some geological observations made on different formations of the rocks, during a geological tour through the eastern, western, and southern parts of the United States in the years 1844-1845. By Doctor Albert C. Koch 2nd ed.. Retrieved from the Digital Public Library of America, https://archive.org/details/descriptionofhyd00koch
MLA citation style
Koch, Albert C. Retrieved from the Digital Public Library of America <https://archive.org/details/descriptionofhyd00koch>.
Note: These citations are programmatically generated and may be incomplete.