Correlation papers ; Cambrian /

Walcott, Charles D. 1850-1927.

Correlation papers ; Cambrian / by Charles Doolittle Walcott. - Washington, Govt. Print. Off., 1891. - 447 p. : iii fold. maps, diagrs. ; 24 cm. - U.S. Geological survey. Bulletin no. 81 . - United States. Geological Survey. Bulletin ; 81. .

Literature : p. 19-48.

gs 05000660


Geology, Stratigraphic--Cambrian.
Geology--United States.

QE75 / .B9 no. 81

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