The
North American continent during Cambrian time
Walcott, Charles D. (Charles Doolittle)
1850-1927
creator
text
dcu
Washington
Gov't. print. off.
1892
monographic
eng
523-568 p. pl. XLII-XLV (incl. double maps) diagrs. 31 cm.
by Charles D. Walcott.
Cover title.
Extract from the 12th annual report of the director of the U.S. Geological survey, 1890-91, pt. I.
Geology, Stratigraphic
Cambrian
Geology
North America
QE656 .W2
gs 06001021
U.S. Geol. survey. Lib.
770117
20260227111304.0
gs 06001021