北美西部内陆海盆Niobrara组的钙质超微化石及其环境意义——Ⅱ：古环境研究
刘怀宝， D．K．Watkins
Calcareous Nannofossils from the Niobrara Formation(Upper Cretaceous)and Pareoenvironments of the North American W estern Interior Basin Part II:Pareoenvironment Study
LIU Huai-bao1， D.K.Watkins2
J4
.
2004, (1): 26
-38
.
