1.
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2.
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[Washington, D.C.?] : U.S. Dept. of Labor, Bureau of Labor Statistics, [1989]
L 2.71/5-2: 95-6 |
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3.
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New York : Bowker, c1947.
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4.
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Cambridge, MA : Harvard University Press, [2013] ©1952
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5.
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Cambridge, Mass. : The Benknap Press of Harvard University Press, 1957-1968.
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6.
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Cambridge, Harvard University Press, 1952.
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7.
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Council Bluffs, Iowa : Yellow Barn Press, 1988, c1962.
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8.
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New York : Grolier, c1948.
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