Author
Dawson, Lawrence H. 1880-
1
Encyclopaedia Britannica, Inc
1
Garris, Arthur
1
Hemp, William H.
1
Hildebrandt, Rachel
1
McElroy, Robert McNutt, 1872-1959
1
Muir, Ramsay, 1872-1941
1
Ogilvie, Philip W.
1
Old York Road Historical Society
1
Philip, George D. E.
1
Potomac Water Trail Association
1
Poxon, Marita Krivda
1
Skaler, Robert Morris
1
Summa, Frank
1
Summa, Marie
1