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1Published 1964.“…U.S. Department of Labor, Bureau of Labor Standards,…”
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2Published 1955.“…U.S. Department of Labor, Bureau of Labor Standards,…”
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3Published n.d.]“…U.S. Department of Labor; Bureau of Labor Standards,…”
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4Published [1954]“…U.S. Department of Labor. Bureau of Labor Standards,…”
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5Published [1953]“…U.S. Department of Labor. Bureau of Labor Standards,…”
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6Published 1965.“…U.S. Department of Labor, Bureau of Labor Standards,…”
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7Published [1964]“…U.S. Department of Labor, Bureau of Labor Standards,…”
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8Published [1964]“…U.S. Department of Labor, Bureau of Labor Standards,…”
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9Published 1962.“…U.S. Department of Labor, Bureau of Labor Standards, Division of State Services,…”
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