Nigeria: Sources

• Nigeria Official Gazette. Federation of Nigeria : Official Gazette (No. 54, 1 Oct 1954 - No. 77, Extra, 30 Sep 1963) || Federal Republic of Nigeria : Official Gazette (Extra, No. 78, 1 Oct 1963- Extra, No. 51, 24 May 1966; No. 86, 1 Sep 1966-) || The Republic of Nigeria : Official Gazette (No. 51, 26 May 1966 - Extra, No. 85, 1 Sep 1966). online: 1953-1955, 1957-1989, 1997, 1999-2025

• Federation of Nigeria : Official Gazette, No. 39, 1 Jun 1961
• Federation of Nigeria : Official Gazette, No. 63, 31 Aug 1961