Safety code for the protection of industrial workers in foundries : National Founders' Association : American Foundrymen's Association, sponsors : tentative American standard approved June, 1922, by American Engineering Standards Committee
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書誌事項
Safety code for the protection of industrial workers in foundries : National Founders' Association : American Foundrymen's Association, sponsors : tentative American standard approved June, 1922, by American Engineering Standards Committee
(Safety code series)(Bulletin / Bureau of Labor Statistics, no. 336)
G.P.O., 1923
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