Author
Great Britain. Post Office
20
Patten, Thomas G., 1861-1939
8
Post Office
7
Ireland. Commission of Enquiry into the Post Office
5
General Post Office (Dublin, Ireland)
4
Ireland. General Post Office
3
Post Office. Engineering Dept
3
United States. Post Office Dept
3
Great Britain. Post Office. Engineering Dept
2
Lang, Charles D.
2
Pearse, Margaret, 1857-1932
2
Castleton, of the Penny Post Office
1
County and City of Cork Post-Office General Directory
1
Cumann Lucht Innealltóireachta Poist Oifig na hÉireann
1
Fourth Post Office Mutual Building Society
1
Fowler, Joseph H. (Joseph Hilary), 1883?-1945
1
Gas Light and Coke Company
1
Glazier, Willard W., 1841-1905
1
Great Britain. Commissioners Appointed to Inquire into the Management of the Post-Office Dept
1
Great Britain. Committee on Post Office Wages
1
Great Britain. Parliament. House of Commons. Select Committee on Marconi's Wireless Telegraph Company, Limited, Agreement
1
Great Britain. Parliament. House of Commons. Select Committee on Post Office Servants
1
Great Britain. Post Office. Committee on Broadcasting, 1960
1
Great Britain. Post Office. Engineering Dept. Research Station, London
1
Irish Post Office Engineering Union Annual Conference 1973 : Wexford)
1
Lamar, William H., 1859-1928
1
Miller, Liam
1
Montgomery, Niall, 1915-1987
1
O'Brien, Art Patrick, 1872-1949
1
Post Office (Dublin)
1
U.S. Post Office Dept
1
United States. Post Office Dept. Division of Stamps and Philately
1
United States. Post-office Dept. Division of Stamps
1