Mines and Mineral Resources of Nevada County, California. - Some of the best known mining districts in California are in Nevada county including, North Bloomfield, Grass Valley and Nevada City among many more. This book out of print since 1918 covers the many mines and districts of Nevada County along with the Mineral deposits and Geology plus a lot of lost history. One of the best publications on the County for information on the old mines. Now back in Print by Sylvanite Publishing.