- Delteil, Léo, 1872-1929 (290)
- Grand-Carteret, John, 1850-1927 (290)
- Steele, Frederic Dorr, 1873-1944 (204)
- Lecornu, Joseph (132)
- May, Charles Paul (79)
- Ovitt, S. W. (editor) (65)
- Hoernes, Hermann, 1858-1948 (58)
- Marsh, William Lockwood, 1886-1963 (58)
- Tissandier, Gaston, 1843-1899 (45)
- Braunburg, Rudolf (44)
- Upson, Ralph Hazlett, 1888- (44)
- Flammarion, Camille, 1842-1925 (41)
- Glaisher, James, 1809-1903 (41)
- Verne, Jules, 1828-1905 (41)
- de Fonvielle, Wilfrid, 1824-1914 (41)
- Hearne, R. P. (35)
- Miller, Francis Trevelyan (35)
- Wellman, Walter, 1858-1934 (35)
- Figuier, Louis, 1819-1894 (34)
- Köhler, Wilhelm (editor) (34)
