| title | media type | ISBN-13 | year of publication |
|---|---|---|---|
| Investigations as to Pneumatic-Tube Service for the Mails: Letter From the Postmaster-General, Submitting the Report of an Investigation as to Pneumatic-Tube Service for the Mails | Hardcover | 978-0-666-05271-1 | 2018 |
| Laws and Regulations for the Government of the Post Office Department, 1852 | " | 978-0-260-79770-4 | 2018 |
| Rural Free Delivery, Its History and Development: Extracts From the Annual Report of First Assistant Postmaster-General Perry S. Heath for the Fiscal Year Ended June 30, 1899 | " | 978-0-260-44643-5 | 2018 |
| Rural Free Delivery, Its History and Development: Extracts From the Annual Report of First Assistant Postmaster-General Perry S. Heath for the Fiscal Year Ended June 30, 1899 | Paperback | 978-1-333-67598-1 | 2018 |
| Supplement to the Postal Laws and Regulations of the United States of America | " | 978-1-333-26407-9 | 2018 |