↑"Kalems for July". The Moving Picture World. July 8, 1916. Diakses tanggal November 26, 2013. Helen risked her life by a thrilling leap from the cab of one engine to the warning ropes strung around the tracks and a drop a second later to the top of a closely pursuing locomotive. A half day's rehearsal and many narrow escapes were encountered before the double-barreled feat could be accomplished.
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Wikimedia Commons memiliki media mengenai Helen Gibson.
