Adapted from the 1951 Republic movie, "Rough Riders of Durango".
Writer and artist credits per Martin O'Hearn's blog: http://martinohearn.blogspot.com/2013/07/whats-he-doing-at-fawcett.html
Nick Caputo suspects that another penciller may have worked on the story along with Roth. Both O'Hearn and Caputo are uncertain of the inker.