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Coal-mine Accidents in the United States, 1932
Charles Freeman Jackson
George Edward McElroy
Lee Clyde Ilsley
Percy Nicholls
United States. Bureau of Mines
William Waugh Adams
Hilary Breton Brunot
John Ballantine Knaebel
L. E. Geyer
Chilton Austin Wright
Howard Bassett Freeman
出版
U.S. Government Printing Office
, 1934
URL
http://books.google.com.hk/books?id=25ituwEACAAJ&hl=&source=gbs_api