Authors: Carl (sorted by quantity of books)
- Kingsbury, Carlton A., Mrs. - 2 books
- Walser, Karl 1877-1943 2 books
- Ruediger, William Carl 1874- 2 books
- Noyes, Carleton Eldredge 1872-1950 2 books
- Becker, Carl L. (Carl Lotus) 1873-1945 2 books
- Neumann, Carl W. (Carl Wilhelm) 1871-1939 2 books
- Küchler, Carl 1869-1945 2 books
- Bunge, Carlos O. (Carlos Octavio) 1875-1918 2 books
- Seitz, Don Carlos 1862-1935 2 books
- Schillings, C. G. (Carl Georg) 1865-1921 2 books
- Larsson, Carl 1853-1919 2 books
- Neufeld, Charles 1856-1918 2 books
- Hartmann, Sadakichi 1867-1944 2 books
- Almqvist, C. J. L. (Carl Jonas Love) 1793-1866 2 books
- Scobel, Albert 1851-1912 2 books
- Harnack, Adolf von 1851-1930 2 books
- Cantarelli, Carlo - 2 books
- Paiva de Andrada, Joaquim Carlos 1846-1928 2 books
- Barbiera, Raffaello 1851-1934 2 books
- Hilty, Karl 1833-1909 2 books
- Clausewitz, Carl von 1780-1831 2 books
- Estlander, Carl Gustaf 1834-1910 2 books
- Belgiojoso, Carlo 1815-1881 2 books
- Lorck, Carl Berendt 1814-1905 2 books
- Geiger, Carl Ignaz 1756-1791 1 book
