The Helderberg Group and the position of the Silurian-Devonian boundary in North America
TITLE_DISPLAY:
The Helderberg Group and the position of the Silurian-Devonian boundary in North America
个人著者:
出版信息:
Washington, [D.C.] : U.S. G.P.O., 1964.
格式:
图书
系列:
Geological Survey bulletin ; 1180-B
Contributions to stratigraphic paleontology
物理描述:
iii, 19 p. : map ; 24 cm.