00998cam a22002651 4500 ss 45000054 DLC 20260227112751.0 781001s1942 xx 000 0 eng c ss 45000054 (OCoLC)4264624 U.S. Social security board. Library OAk DLC premarc HA40.I6 U65 1942 331.7 United States. Social Security Board. Committee on Industrial Classification Practices. Industrial classification code. 3d ed. Washington, D.C., Federal Security Agency, Social Security Board, 1942. 3 v. Reproduced from type-written copy. "Prepared by the Social Security Board, Committee on Industrial Classification Practices."--Foreword. I. Description of industries.--II. Manufacturing index.--III. Nonmanufacturing index. Industries United States Classification. 90900 90900