Annual report of the state mineralogist for the year ending ..., Cross section plates accompanying geological map of Iowa Hill Mining District., and Longitudinal section plates accompanying geological map of Iowa Hill Mining District.
Description:
Includes chart of the "Average grade of channels."
Publisher:
California State Mining Bureau,
Subject (Name):
California State Mining Bureau
Subject (Topic):
Geology--California--Placer County--Maps and Gold mines and mining--California--Placer County--Maps
