| proquest historical newspapers | 1.6 | 0.9 | 6538 | 30 | 93 |
| proquest historical newspapers online | 1.35 | 0.2 | 9277 | 37 | 99 |
| proquest historical newspapers: | 1.9 | 0.9 | 4582 | 31 | 54 |
| proquest historical newspapers new york times | 1.66 | 1 | 9446 | 45 | 78 |
| proquest historical newspapers tampa | 0.68 | 0.4 | 2579 | 36 | 8 |
| proquest historical newspapers nyu | 0.65 | 0.3 | 6906 | 34 | 49 |
| proquest historical newspapers archive | 0.71 | 0.7 | 4523 | 38 | 20 |
| proquest historical newspapers password | 1.72 | 0.3 | 8831 | 39 | 54 |
| proquest historical newspapers database | 1.38 | 0.8 | 1589 | 39 | 97 |
| proquest historical newspapers database free | 1.02 | 0.2 | 3667 | 44 | 54 |
| proquest bc historical newspapers | 0.62 | 0.6 | 5367 | 33 | 42 |
| proquest historical black newspapers | 1.89 | 0.4 | 3799 | 36 | 58 |
| uiuc proquest historical newspapers | 0.7 | 0.5 | 9631 | 35 | 70 |
