1
Published 1990
2
Published 2007
3
4
Published 1990
5
by Penslar, Derek Jonathan
Published 2007
6
by Pankhurst, Alula, 1962-
Published 1992
7
by Wali, Alaka
Published 1989
8
by Harris, William Wilson
Published 1980
9
by Efrat, Elisha
Published 1988
10
by De Onis, Juan, 1927-
Published 1992
11
Published 1991
12