Merkoša sitáhtat
APA-čujuhus (7. p.)
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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Chicago-čujuhus (17. p.)
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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MLA-čujuhus (9. p.)
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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