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Injury experience in the metal and nonmetal industries, 1955
Injury experience in quarrying, 1957 / by John C. Machisak, Naomi W. Kearney, and Zelda S. Glidden.
Injury experience in coal mining, 1957
Injury experience in the metal industries, 1956 and 1957
Injury experience in the nonmetal industries (except stone and coal), 1956 and 1957
The National Safety Competitions of 1948-58
The National safety competition of 1959
Injury experience in the metal industries, 1958
Injury experience in quarrying, 1958
The National safety competition of 1960
Injury experience in the nonmetal industries (except stone and coal), 1958
Injury experience in the metal industries, 1959
Injury experience in the metal industries, 1960
Injury experience in the nonmetal industries (except stone and coal), 1959
Injury experience in quarrying, 1959