| is history.com an encyclopedia | 1.08 | 0.5 | 6189 | 30 | 1 |
| is world history encyclopedia a database | 1.25 | 0.2 | 7221 | 40 | 43 |
| an encyclopedia of world history | 1.17 | 0.8 | 1932 | 32 | 28 |
| the free encyclopedia history | 0.54 | 0.7 | 9060 | 29 | 69 |
| history of the encyclopedia | 0.26 | 0.6 | 1937 | 27 | 59 |
| what is an encyclopedia | 0.18 | 0.9 | 8260 | 23 | 88 |
| the encyclopedia definition world history | 0.7 | 0.4 | 6292 | 41 | 80 |
| what is an online encyclopedia | 1.76 | 0.6 | 4291 | 30 | 84 |
| world history encyclopedia website | 0.26 | 0.1 | 4378 | 34 | 88 |
| encyclopedia or wikipedia history | 0.21 | 0.6 | 6263 | 33 | 11 |
| world history encyclopedia online | 0.95 | 0.2 | 7522 | 33 | 91 |
| the encyclopedia of ancient history | 1.02 | 0.6 | 7028 | 35 | 28 |
| encyclopedia.com is considered to be | 0.45 | 0.9 | 3982 | 36 | 96 |
| wikipedia the free encyclopedia history | 0.21 | 0.2 | 9944 | 39 | 60 |
| encyclopedia of us history | 1.49 | 0.4 | 7345 | 26 | 40 |
