Biostratigraphy of the Pennsylvanian and Permian systems in southern Nevada

Biostratigraphy of the Pennsylvanian and Permian systems in southern Nevada is …
instance of (P31):
thesisQ1266946

P2093author name stringJohn Elliott Welsh
P4101dissertation submitted toUniversity of UtahQ168515
P577publication date1959-01-01
P1476titleBiostratigraphy of the Pennsylvanian and Permian systems in southern Nevada

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