Other
Wolfert, Marion
5
Glazier, Ira A.
4
Zimmerman, Gary J.
4
Anderson, Robert Charles, 1944-
3
Burgert, Annette K.
3
Burkett, Brigitte
2
Great Migration Study Project (New England Historic Genealogical Society)
2
Hacker, Werner, active 1970-
2
Mitchell, Brian
2
Baker, Dessie
1
Bork, Inge
1
Bracy, Isabel, 1910-
1
Coldham, Peter Wilson
1
Derry Youth & Community Workshop
1
Dobson, David
1
Dobson, David, 1940-
1
Erie Society for Genealogical Research
1
Filby, P. William 1911-2002
1
Froelke, Ruth
1
Great Migration Study Project (New England Historic Genealogical Society),
1
Grubb, Farley Ward, 1954-
1
Guerrero, John
1
Hall, Charles M.
1
Heritage International
1
J. & J. Cooke (Derry, Northern Ireland)
1
New England Historic Genealogical Society
1
Ordnance Survey of Northern Ireland
1
Owen, Andrea
1
Rupp, I. Daniel 1803-1878
1
Sanborn, George Freeman, 1944-
1
Sanborn, Melinde Lutz
1
Schenk, Trudy
1
Schrader-Muggenthaler, Cornelia
1
Sherman, William C. 1927-
1
Smith, Clifford Neal
1
Whitney, Paul L., 1954-
1