On the Savannah: Narie Pauline Thorbecke's Images from Cameroon, West Africa (1911-12)v. 49No. 2150–158
Geary, Christraud M. 1990. "On the Savannah: Narie Pauline Thorbecke's Images from Cameroon, West Africa (1911-12)." Art Journal, 49, (2) 150–158.