PLF completed work on the 1934-2012 Historical Record document as part of its contribution to commemorate the 200th Anniversary of the establishment of the General Land Office. The PLF documents the organizational history of the BLM and the line office managers who have headed the principal offices of the agency. Since BLM’s roots are in the Grazing Service, the General Land Office, and the O&C Revested Lands Administration, those agencies are included as well.