In the footsteps of Lewis and Clark /
by Gerald S. Snyder, photos, by Dick Durrance II, illustrated by Richard Schlecht, foreword by Donald Jackson, produced by the Special Publications Division.
- Washington : National Geographic Society, [1970].
- 215 p. : illus. (part col.), facsims., maps, col. ports. ; 27 cm.
- National geographic special publications .
- 910.4(73) (NLA) .
- National geographic special publications. .