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地质学报 1935
UBERDASVORKOMMENVONCALLIPTERLSCONFERTASTERNB.INDERUNTERENSHIHHOTZESERIEINCENTRAL-SHANSIAbstract: "ThemostseriousobjectiontoplacingtheLowerShihhotzefloraintheLowerPermianisthenegativeevidencepresentedbytheabsenceofanyspeciesofCallipteris.AsespeciallypointedoutbyGothan,however,Callipterisis
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