Campbell, Lyle. 1985. The Pipil Language of El Salvador. (Mouton Grammar Library, 1.) Berlin, New York: Mouton de Gruyter. xiv+957pp.
http://www.degruyter.com/view/books/9783110881998/9783110881998/9783110881998.xml
@book{campbell1985pipil,
address = {Berlin, New York},
author = {Lyle Campbell},
pages = {xiv+957},
publisher = {Mouton de Gruyter},
series = {Mouton Grammar Library},
title = {The Pipil Language of El Salvador},
url = {http://www.degruyter.com/view/books/9783110881998/9783110881998/9783110881998.xml},
volume = {1},
year = {1985}
}