"Lewis, Charles Bertrand". The House of Beadle & Adams and its Dime and Nickel Novels. University of Oklahoma Press. Archived from the original on March 4, 2016. Retrieved October 3, 2016.
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"Lewis, Charles Bertrand". The House of Beadle & Adams and its Dime and Nickel Novels. University of Oklahoma Press. Archived from the original on March 4, 2016. Retrieved October 3, 2016.