The study of Early Cretaceous angiospermous pollen in northern China.
Foreign title:
In Chinese with English summary
Reference:
Yu,J. (1990)
The study of Early Cretaceous angiospermous pollen in northern China. [ In Chinese with English summary ] Professional Papers of Stratigraphy and Palaeontology,(Diceng Gushengwu Lunwen Ji). Chinese Academy of Geological Sciences
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