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Dyfyniad APA
Lesley J. Peter. (1888). Atlas to accompany part 4, Annual Report of the Geological Survey of Pennsylvania for 1886. William A. Ingham.
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Dyfyniad Arddull Chicago
Lesley J. Peter. Atlas to Accompany Part 4, Annual Report of the Geological Survey of Pennsylvania for 1886. William A. Ingham, 1888.
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Dyfyniad MLA
Lesley J. Peter. Atlas to Accompany Part 4, Annual Report of the Geological Survey of Pennsylvania for 1886. William A. Ingham, 1888.
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