| Author | Titles | | 1.
| Wynne, Michael | 1 | | 2.
| Wynne-Ellis, Michael | 1 | | 3.
| Wysocan, Paul | 1 | | 4.
| Wyver, John | 1 | | 5.
| Wyzewa, Teodor de, 1863-1917 | 22 | | 6.
| X*** | 1 | | 7.
| X, 1948- | 1 | | 8.
| A. X. F. A. | 1 | | 9.
| X., pseud. | 0 | | 10.
| Author is: Viana, Abel, 1896-1964 | 117 | | 11.
| Xabregas, Joaquim | 1 |
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