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}
}