Some Late Cretaceous and Early Tertiary assemblages of ostracoda, spores and pollen in China.
Reference:
Hao,Y.-C. et al. (1979)
Some Late Cretaceous and Early Tertiary assemblages of ostracoda, spores and pollen in China. Cretaceous-Tertiary Boundary Events Symposium II. Proceedings.(W.K.Christensen and T.Birkelund,editors). University of Copenhagen
P. 251- 255