Object Type: FolderIn Folder: Proof of Labor Records; (1859-1973)
1913-1934 Index to Proof of Labor
Code 2230.3.1 (pdf)
1949-1965 Index to Proof of Labor
1964-1973 Index to Proof of Labor
1935-1949 Index to Proof of Labor
1859-1913 Index to Proof of Labor