| Search Method | Frequency | Percent |
| Title | 82 | 32.7 |
| Author | 22 | 8.8 |
| Subject | 46 | 18.3 |
| Keyword | 21 | 8.4 |
| Total | 171 | 68.1 |
| No response | 80 | 31.9 |
| Total | 251 | 100.0 |