Aero view of the Panama Canal, looking southwest, The world's greatest engineering feat to be realized 395 years after first proposed /
Poole Brothers.
cartographic
Maps. lcgft
Chicago : Poole Bros.,
1912.
eng
Relief shown pictorially.
Includes distance tables.
Panama Canal (Panama)--Maps.
Panama Panama Canal.
Available also through the Library of Congress Web site as a raster image.
http://hdl.loc.gov/loc.gmd/g4872p.ct003482