Keith Nicklin : Crosser River Studies

Keith Nicklin and Jill Salmons : Cross River Art Styles

D. R. Rosevear : Cross River Tombstones

Elliot Leib and Renée Romano : Reign of the Leopard. Ngbe Ritual

V. I. Ekpo : Qua Terracotta Sculptures

Rosemary Harris : Mbembe Men's Associations

Herbert M. Cole : Igbo Arts at UCLA

Arnold Udoka : Ekong Songs of the Annang

Hans-Joachim Koloss : Njom among the Ejagham