Campbell, Lyle. 1985. The Pipil language of El Salvador. (Mouton Grammar Library, 1.) Berlin: Mouton.
@book{nicholsdiversity-Campbell1985, address = {Berlin}, author = {Campbell, Lyle}, publisher = {Mouton}, series = {Mouton Grammar Library, 1}, title = {The Pipil language of El Salvador}, year = {1985} }