@book{ BB08060674, author = "Gould, Michael and Forsyth, Frederick", title = "The struggle for modern Nigeria : the Biafran War 1967-1970", publisher = "I.B. Tauris", year = "2012", series = "International library of African studies", number = "35", URL = "https://ci.nii.ac.jp/ncid/BB08060674" }