Some Economic Factors Affecting Safety in Underground Bituminous Coal Mines

Autor:	Andrews, W. H., Christenson, C. L.
Zdroj:	Southern Economic Journal, 1974 Jan 01. 40(3), 364-376.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/1056010 Zobrazit plný text záznamu