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 (unpublished).
@unpublished{174710, author = {Hammarström, Harald and Nordhoff, Sebastian}, title = {How many languages have so far been described?}, year = {2011}, hhtype = {comparative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