Second Geological Survey of Pennsylvania Report of Progress PPP figure 4.jpg
Charles Emerson Beecher (1856-1904), James Hall (1811-1898), John Peter Lesley (1819-1903), John Simpson Africa (1832-1900)
en
Second Geological Survey of Pennsylvania Report of Progress PPP figure 4, Second Geological Survey of Pennsylvania Report of Progress PPP
commons
en
Second Geological Survey of Pennsylvania Report of Progress PPP figure 4, Second Geological Survey of Pennsylvania. Report of Progress. PPP. Figure 4
commons
ja
ペンシルベニア第2地質調査所報告 進歩PP図4、ペンシルベニア第2地質調査所報告 進歩PPP
commons_translated
ja
ペンシルベニア第2地質調査所報告PPP図4、ペンシルベニア第2地質調査所。進歩報告。国民会議派。図4
commons_translated
progress report amontillado polluter proceed progress sea serpent work in progress