Early in the game and in Latin Market, But Industry's Growth Raises Concern". Billboard. Vol. 107, no. 31. Prometheus Global Media. 1996. p. 9. ISBN 0837902258. 2. ↑ Sheet 17: Lagos (Map). 1:2,000,000. Series 2201. Defense Mapping Agency Topographic Center. April 1973. 7°33′54″N 2°07′44″E / 7.565°N 2.129°E / 7.565; 2.129