| Author | Titles | | 1.
| Bullock, Barbara Wilson | 1 | | 2.
| Bullock, Marcus Paul, 1944- | 1 | | 3.
| Bullock, Maria Giovana | 1 | | 4.
| Bullock, Michael | 7 | | 5.
| Bullock, Natasha | 2 | | 6.
| Bullock, Nicholas | 1 | | 7.
| Bullock, Wynn, 1902-1975 | 1 | | 8.
| Bullón, Gonzalo | 1 | | 9.
| Bullot, Érik | 1 | | 10.
| Bullough, Geoffrey | 2 |
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