George Washington Goethals: Brief biography.
Goethals' Obituary: As published in The New York Times January 22, 1928.
The Panama Canal: Full illustrated text of an address by Colonel Goethals to the National Geographic Society, February 10, 1911.
The Panama Canal: An excerpt from Goethal's article in the National Geographic Magazine, February, 1911.
Wikipedia: George Washington Goethals: Biography, portrait, works and related links.