Welmers, William E. 1970. The derivation of Igbo verb bases. Studies in African Linguistics 1. 49-59.
@article{Welmers-1970, author = {Welmers, William E.}, journal = {Studies in African Linguistics}, pages = {49-59}, title = {The derivation of Igbo verb bases}, volume = {1}, year = {1970}, iso_code = {ibo}, olac_field = {typology; general_linguistics; syntax}, wals_code = {igb} }