A study of minimum rate and increment differentials in steelworker-organized plants of companies, in the basic steel, pig iron, and iron ore industries, and in other major companies with 2,500 or more employees in steelworker-organized units in the United States and Canada for the three contract years 1956, 1957, 1958, showing A. remaining differentials, B. reductions in and elimination of differentials, C. increases in differentials.

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