Hammarström, Harald & Sebastian Nordhoff. 2011. How many languages have so far been described?. (unpublished).
@unpublished{174710,
author = {Hammarström, Harald and Nordhoff, Sebastian},
title = {How many languages have so far been described?},
year = {2011},
hhtype = {comparative (computerized assignment from "languages")},
src = {sn}
}