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Google圖書搜尋
Tertiary Stratigraphy of the Niobrara River Valley, Marsland Quadrangle, Western Nebraska
Daniel A. Yatkola
出版
Conservation and Survey Division, Institute of Agriculture and Natural Resources, University of Nebraska-Lincoln
, 1978
URL
http://books.google.com.hk/books?id=hP04g7T6HwsC&hl=&source=gbs_api