Elenco - Prospecting for Petroleum
Conrad Nagel
The Voice of Oil (voice)
H.B. Warner
The Voice of History (voice)
Gayne Whitman
The Geologist (voice)
Will Wright
The Professor (voice)
John Mather
The Barker (voice) Conrad Nagel
The Voice of Oil (voice)H.B. Warner
The Voice of History (voice)Gayne Whitman
The Geologist (voice)Will Wright
The Professor (voice)John Mather
The Barker (voice)