ERBzine 0682: Darrell Richardson: St. John Bibliographyhttps://www.erbzine.com/mag6/0682.html
0220 Illustrated Reference list of ERB pulp mag appearances from 1912 ERBzine 0239 Sacred Icons of J. Allen St. John by Nkima ERBzine 0240 Numa's Lair with Guide our Other
ERBzine 0773: War Chief C.H.A.S.E.R.https://www.erbzine.com/mag7/0773.html
as being among the reference materials he used: The Marvellous Country: Three Years in Arizona and New Mexico, the Apache's Home by Samuel Woodworth Cozzens 1873 Thrilling Days in
War Chief by Edgar Rice Burroughs: An Illustrated Bibliography Entry from ERBzine.com
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