17 John Higham, Strangers in the Land (New Brunswick, N.J., 1955), 311.

18 The changing ethnic composition of the American Population has been estimated as follows in the 20th century:

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Source: U.S. Bureau of the Census, Current Population Reports, series P-20; and SAUS (1976), table 40; estimates of non-European ethnic stocks as indicated are drawn from the Census of 1970.