Mining Camps–A Study in  American Frontier Government  was written by Charles Howard Shinn in 1885.  It is available in full at the link I provide from the Bancroft Library of the University of California.  How can one resist such prose:

This book is an attempt to break new ground in a comparatively new field and to examine the laws and customs, not of primitive pastoral nor of primitve agricultural communities, but of the workers in ores, and the toilers in auriferous river-sands. 

Here are two other papers that I found fascinating on the modern version of the topic: 

Both are by James West who is an Associate with Quantec, LLC in Portland, Oregon.

And in a lighter vein see Valley Detector Sales for more books on the old mining camps of California.