List of permissible explosives, lamps and motors tested prior to January 31, 1920

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Bibliographische Detailangaben
Veröffentlicht in:	Coal-mine fatalities in the United States
1. Verfasser:	Howell, Spencer P. (VerfasserIn)
Format:	UnknownFormat
Sprache:	eng
Veröffentlicht:	1920
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Titel	Jahr	Band
Coal-mine fatalities in the United States. Monthly statement of coal mine fatalities in the United States 1922	1923	1922
Coal-mine fatalities in the United States. Monthly statement of coal mine fatalities in the United States 1921	1922	1921
Coal-mine fatalities in the United States. Monthly statement of coal mine fatalities in the United States 1920	1921	1920
Coal-mine fatalities in the United States 1919 and coal-mine statistics supplementing those published in Bulletin 115	1920	1919