Family (money) income, 1947 to 1971: summarizing twenty-five years of a summary statistic /

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100 years of technical excellence.

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Afghanistan : eight years of Soviet occupation.

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Tracking the American dream : fifty years of housing changes.

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Century of service: the first 100 years of the United States Department of Agriculture.

"Literature cited": p. 419-439

Health in the later years of life; selected data from the National Center for Health Statistics.

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