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Start Over Authors Agricola, Georg, 1494-1555, author ✖Remove constraint Authors: Agricola, Georg, 1494-1555, author Authors Hoover, Herbert Clark, 1874-1964, author/translator ✖Remove constraint Authors: Hoover, Herbert Clark, 1874-1964, author/translator

1. Three vertical shafts

Author(s):
Agricola, Georg, 1494-1555, author
Hoover, Herbert Clark, 1874-1964, author/translator
Publication:
London: The Mining Magazine, 1912

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  • Agricola, Georg, 1494-1555, author1
  • Hoover, Herbert Clark, 1874-1964, author/translator1