Title: Preliminary inventory of the records of the Bureau of the First Assistant Postmaster General, 1789-1942
Subtitle: (Record Group 28)
First published: 1951
Subjects: Catalogs, United States, Sources, Postal service, Bibliography, Archives, United States. Bureau of the First Assistant Postmaster General, History, United States. Bureau of Post Office Operations
Places: United States
LC classification: CD3026 .A32 no. 36