Ian Maddieson and Kristin Precoda. 1990. Updating UPSID. 74. Department of Linguistics, UCLA. 104–111pp.
@misc{MaddiesonPrecoda1990,
author = {Ian Maddieson and Kristin Precoda},
booktitle = {UCLA Working Papers in Phonetics},
pages = {104–111},
publisher = {Department of Linguistics, UCLA},
title = {Updating UPSID},
volume = {74},
year = {1990}
}