Ford Motor Company. Industrial Relations Department.

Large-scale unionization of Detroit's automobile industry began after passage of the Wagner Act that allowed labor unions to organize workers was passed in 1935. By 1941, Ford Motor Company was the last major automaker that was not unionized. After a brief ten day wildcat strike in April, 1941 Ford Motor Company agreed to allow workers to vote for union representation.

From the description of National Labor Relations Board cases and statements records, 1940-1941. (The Henry Ford). WorldCat record id: 774599461