| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Yellowstone National Park Monthly Report for May, 1920 | Paperback | 978-0-260-28571-3 (0-260-28571-4) | 2018 |
| Yellowstone National Park Monthly Report for May, 1920 | Hardcover | 978-0-331-05708-9 (0-331-05708-5) | 2018 |
N.P. · [s.n.] · S. P. · U.n. · U.P. · U. S. · United States National Park Service