Wheeler, Alva L. 1970. Grammar of the Siona Language, Colombia, South America. (Doctoral dissertation, University of California at Berkeley; 197pp.)
http://proquest.umi.com/pqdweb?did=755463181&sid=1&Fmt=1&clientId=56146&RQT=309&VName=PQD
@phdthesis{dryerorder-hhgWheelerSiona,
author = {Wheeler, Alva L.},
key = {Wheeler 1970},
pages = {197},
school = {University of California at Berkeley},
title = {Grammar of the Siona Language, Colombia, South America},
url = {http://proquest.umi.com/pqdweb?did=755463181&sid=1&Fmt=1&clientId=56146&RQT=309&VName=PQD},
year = {1970}
}