Efik traders of Old Calabar : containing The diary of Antera Duke, an Efik slave-trading chief of the eighteenth century, together with An ethnographic sketch and notes /
by Donald C. Simmons, and an essay on The political organization of Old Calabar, by G.I. Jones.
- London : Dawsons of Pall Mall for the International African Institute, 1968.
Reprinted for the International African Institute.
Bibliography: p. [161]-162.
An ethnographic sketch of the Efik people / Donald C. Simmons -- The diary of Antera Duke ... in a modern English version / by A.W. Wilkee and Donald C. Simmons -- The political organization of old Calabar / G.J. Jones.