Biodiversity Heritage Library
Site maintenance lasting 1 hour is scheduled to begin at 6:00PM CST (GMT-6) on November 24, 2015.
By "Hoover, Lou Henry, 1874-1944"
Georgius Agricola De re metallica,
By: Agricola, Georg, - Hoover, Herbert, - Hoover, Lou Henry,
Publication info: London :The Mining magazine,1912.
Contributed by: University of California Libraries (archive.org)