S.O. · United States Signal Office
| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Annual Report of the Chief Signal Officer of the Army to the Secretary of War, Vol. 1 of 2: For the Year 1887 | Hardcover | 978-0-267-03908-1 (0-267-03908-5) | 2019 |
| Annual Report of the Chief Signal Officer of the Army to the Secretary of War, Vol. 1 of 2: For the Year 1887 | Paperback | 978-0-483-49167-0 (0-483-49167-5) | 2019 |
| Annual Report of the Chief Signal Officer to the Secretary of War | " | 978-1-144-93057-6 (1-144-93057-X) | 2010 |