Map Of Panama Showing Canal, 1904
Science Source
Panama Canal Construction 1910
Photo Researchers
Walter Reed, American Army Physican
Science Source
William Gorgas, American Army Physician #1
Science Source
Panama Canal Construction, 1910 #1
Photo Researchers
Diagram Of Panama Canal, 1904
Science Source
Gatun Locks, Panama Canal
Frederica Georgia
Roosevelt, Panama Canal Construction
Omikron
Tungara Frog Vocalizing #1
Gregory G. Dimijian, M.D.
Tungara Frog Vocalizing
Gregory G. Dimijian, M.D.
George Washington Goethals, American
Science Source
Walter Reed, American Army Physican #2
Science Source
William Gorgas, American Army Physician
Science Source
Walter Reed, American Army Physician
Science Source
Walter Reed, American Army Physican #1
Science Source
John F. Stevens, American Engineer
Photo Researchers
Walter Reed, American Army Physican #3
Science Source
Canal Zone Tree Frog #1
Dante Fenolio
Canal Zone Tree Frog
Dante Fenolio