The westward crossings
Subtitle: Balboa, Mackenzie, Lewis and Clark
By: [by] Jeanette Mirsky.
Publisher: A.A. Knopf
Published: 1946
Place of publication: New York
Language: eng
Number of pages: 365
Subjects: Explorers -- North America; America -- Discovery and exploration; North America -- Description and travel
Notes: "Sources and background books": p. 361-365.
"First edition."