The Frontier [v 3 #3, December 1925] ed. Harry E. Maule (Doubleday, Page & Co., 25¢, large pulp, cover by Paul Strayer) Details taken from photocopy of Table of Contents. [PSP]
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The Frontier [v 3 #4, January 1926] ed. Harry E. Maule (Doubleday, Page & Co., bedsheet) from TOC only. [JL]
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The Frontier [v 3 #5, February 1926] ed. Harry E. Maule (Doubleday, Page & Co., 25¢, large pulp, cover by Edgar F. Wittmack) Details taken from photocopy of Table of Contents. [PSP]
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The Frontier [v 3 #6, March 1926] ed. Harry E. Maule (Doubleday, Page & Co., 25¢, large pulp, cover by Edgar Wittmack) Details taken from photocopy of Table of Contents. [PSP]
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The Frontier [v 4 #1, April 1926] ed. Harry E. Maule (Doubleday, Page & Co., 25¢, large pulp, cover by James C. McKell) Details taken from photocopy of Table of Contents. [PSP]
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The Frontier [v 4 #2, May 1926] ed. Harry E. Maule (Doubleday, Page & Co., Inc., 25¢, 12+96pp+, bedsheet, cover by William Reusswig) [JL]
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The Frontier [v 4 #3, June 1926] ed. Harry E. Maule (Doubleday, Page & Co., bedsheet) from TOC only. [JL]
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The Frontier [v 4 #4, July 1926] ed. Harry E. Maule (Doubleday, Page & Co., 25¢, large pulp, cover by Hibberd V. B. Kline) Details taken from photocopy of Table of Contents. [PSP]
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The Frontier [v 4 #5, August 1926] ed. Harry E. Maule (Doubleday, Page & Co., 20¢, 176pp, pulp) from TOC only. [JL]
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The Frontier [v 4 #6, September 1926] ed. Harry E. Maule (Doubleday, Page & Co., 20¢, 176pp, pulp) from TOC only. [JL]
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The Frontier [v 5 #1, October 1926] ed. Harry E. Maule (Doubleday, Page & Co., pulp) from TOC [JL]
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The Frontier [v 5 #2, November 1926] ed. Harry E. Maule (Doubleday, Page & Co., pulp) from TOC only. [JL]
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The Frontier [v1 #2, November 1925] (Worlds Work, pulp, cover by James McKell) [MA:2631]
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The Frontier [v5 #3, April 1927] (Worlds Work, pulp, cover by O. F. Schmidt) [MA:2631]
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