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} }