Paleocene Wuyun flora in Northeast China:Woodwardia bureiensis,Dryopteris sp. and Osmunda sachalinensis
Paleocene Wuyun flora in Northeast China:Woodwardia bureiensis,Dryopteris sp. and Osmunda sachalinensis
中国东北古新世乌云植物群:Woodwardia bureiensis,Dryopteris sp.和Osmunda sachalinensis(英文)