Geothermal exploration in the first quarter century; a collection of papers illustrating early interest in geothermal development, including reports for the Southern Sierra Power Company by H.N. Siegfried in 1925

Select what you would like to download. If choosing to download an image, please select the file format you wish to download.

Certain download types may have been restricted by the site administrator.

Select the item elements you would like to include in the embed code.