Author
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Pennypacker, Samuel W. 1843-1916
5
Pennypacker, Samuel W. 1843-1916,
1
Pfund, Harry William, 1900-
3
Reaman, George Elmore, 1889-1969
1
Richards, George W.
1
Ridgway Baueren- und kohlen Companie
2
Ruff, Paul Miller, 1918-
1
Rupp, William J., 1911-
1
Sachse, Julius Friedrich, 1842-1919
4
Schmidt, Ernst R.
2
Schuler, Henry Addison, 1850-1908
1
Seidensticker, Oswald, 1825-1894
5
Sesqui-Centennial International Exposition
1
Shoemaker, Alfred Lewis, 1913-
1
Sollbach, Gerhard E.
2
Staake, William Heaton, 1846-
1
Steele, Henry Joseph, 1860-1933
1
Weber, Samuel Edwin, 1875-
1
Wokeck, Marianne Sophia, 1947-
1
Zundel, William Arter
1