| 1 | the lewis and clark | | | | | | | 10 | 0.66% |
| 2 | lewis and clark expedition | | | | | | | 6 | 0.40% |
| 3 | of the lewis and | | | | | | | 4 | 0.26% |
| 4 | by gary e moulton | | | | | | | 3 | 0.20% |
| 5 | lewis and clark trail | | | | | | | 3 | 0.20% |
| 6 | university of nebraska press | | | | | | | 3 | 0.20% |
| 7 | september 1806 the lewis | | | | | | | 2 | 0.13% |
| 8 | 1806 the lewis and | | | | | | | 2 | 0.13% |
| 9 | lewis and clark journals | | | | | | | 2 | 0.13% |
| 10 | e moulton university of | | | | | | | 2 | 0.13% |
| 11 | gary e moulton university | | | | | | | 2 | 0.13% |
| 12 | the continent weaving an | | | | | | | 1 | 0.07% |
| 13 | it more the fur | | | | | | | 1 | 0.07% |
| 14 | more the fur trade | | | | | | | 1 | 0.07% |
| 15 | the fur trade given | | | | | | | 1 | 0.07% |
| 16 | help establish the united | | | | | | | 1 | 0.07% |
| 17 | an epic tale of | | | | | | | 1 | 0.07% |
| 18 | weaving an epic tale | | | | | | | 1 | 0.07% |
| 19 | continent weaving an epic | | | | | | | 1 | 0.07% |
| 20 | president jefferson’s directive to | | | | | | | 1 | 0.07% |
| 21 | jefferson’s directive to establish | | | | | | | 1 | 0.07% |
| 22 | directive to establish commerce | | | | | | | 1 | 0.07% |
| 23 | to establish commerce the | | | | | | | 1 | 0.07% |
| 24 | establish commerce the captains | | | | | | | 1 | 0.07% |
| 25 | crosses the continent weaving | | | | | | | 1 | 0.07% |
| 26 | trade part of their | | | | | | | 1 | 0.07% |
| 27 | worked extensively within a | | | | | | | 1 | 0.07% |
| 28 | extensively within a longestablished | | | | | | | 1 | 0.07% |
| 29 | within a longestablished network | | | | | | | 1 | 0.07% |
| 30 | a longestablished network of | | | | | | | 1 | 0.07% |
| 31 | to help establish the | | | | | | | 1 | 0.07% |
| 32 | network of north american | | | | | | | 1 | 0.07% |
| 33 | was to help establish | | | | | | | 1 | 0.07% |
| 34 | mission was to help | | | | | | | 1 | 0.07% |
| 35 | their mission was to | | | | | | | 1 | 0.07% |
| 36 | of their mission was | | | | | | | 1 | 0.07% |
| 37 | part of their mission | | | | | | | 1 | 0.07% |
| 38 | fur trade part of | | | | | | | 1 | 0.07% |
| 39 | longestablished network of north | | | | | | | 1 | 0.07% |
| 40 | often betrayed it more | | | | | | | 1 | 0.07% |