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Dover folio, Delaware-Maryland-New Jersey
(Geological Survey (United States), 1906)
St. Marys folio, Maryland-Virginia
(Geological Survey (United States), 1906)
Choptank folio, Maryland
(Geological Survey (United States), 1912)
Tolchester folio, Maryland
(Geological Survey (United States), 1917)
Elkton-Wilmington folio ; Maryland-Delaware-New Jersey-Pennsylvania
(Geological Survey (United States), 1920)