Lukens Steel Company. No. 7368, in [United States] Court of Appeals for District of Columbia, Lukens Steel Company et al., v. Frances Perkins, individually and as Secretary of Labor, Charles V. McLaughlin, individually and as assistant Secretary of Labor, L. Metcalfe Walling, individually and as administrator of Division of Public Contracts of Department of Labor, et al.; supplemental brief for defendants-appellees.

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