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Injury experience in the quarrying industry, 1954 :analysis of safety factors and related employment data

Injury experience in the quarrying industry, 1955 and 1956 / by John C. Machisak, Naomi W. Kearney, and Zelda S. Glidden.

Injury experience in quarrying, 1957 / by John C. Machisak, Naomi W. Kearney, and Zelda S. Glidden.

Injury experience in quarrying, 1958

Injury experience in quarrying, 1959

Injury experience in quarrying, 1960


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