| Author | Titles | | 1.
| Kostjuk, Olga G. | 1 | | 2.
| Kostka | 1 | | 3.
| Kostof, Spiro | 5 | | 4.
| Kostron, Ivan | 2 | | 5.
| Kostrowisky, Guillaume de, 1880-1918 | 0 | | 6.
| Author is: Apollinaire, Guillaume, pseud. | 20 | | 7.
| Kostrowitski, Guillaume Apollinaire Albert de, 1880-1918 | 0 | | 8.
| Author is: Apollinaire, Guillaume, pseud. | 20 | | 9.
| Kostrowitski, Guillaume-Apollinaire-Albert de, 1880-1918 | 0 | | 10.
| Author is: Apollinaire, Guillaume, pseud. | 20 | | 11.
| Kostrowitsky, Wilhelm Apollinaris de, 1880-1918 | 0 | | 12.
| Author is: Apollinaire, Guillaume, pseud. | 20 | | 13.
| Kostrowitzky, Guillaume Albert Wladimir Alexandre Apollinaire de, 1880-1918 | 0 | | 14.
| Author is: Apollinaire, Guillaume, pseud. | 20 | | 15.
| Kostuilev, N. | 2 |
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