Vols. for 1940-1954 have microform series statement: Government publications relating to Nigeria, l862-l960. Group 4, Nigeria, 1940-1960.
Microfilm. East Ardsley, Wakefield, Yorkshire, England, EP Microform Ltd., 1974. 88 reels. 35 mm. (Government publications relating to Nigeria, 1862-1960. Group 3, Nigeria, 1914-1939) ([Government publications relating to African countries prior to independence])