陝北中生代延長層植物羣
By: Si Xingjian zhu ; Zhongguo ke xue yuan gu sheng wu yan jiu suo, Gu ji zhui dong wu yan jiu shi bian ji
Series: Zhongguo gu sheng wu zhi. Xin jia zhong -- di 5 hao. zong hao di 139 ce; Zhongguo gu sheng wu zhi -- zong hao di 139 ce; Zhongguo gu sheng wu zhi -- di 5 hao
Publisher: Ke xue chu ban she
Published: 1956
Place of publication: Beijing
Language: chi
Number of pages: 217
Subjects: Paleobotany
Other titles: Shan bei zhong sheng dai yan chang ceng zhi wu qun; Older mesozoic plants from the Yenchang formation, northern Shensi
Notes: Summary in English.