http://proquest.umi.com/pqdweb?index=5&sid=3&srchmode=1&vinst=PROD&fmt=6&startpage=-1&clientid=56146&vname=PQD&RQT=309&did=1402170231&scaling=FULL&ts=120 (Publisher version)
Kung, S. S. (2008). A descriptive grammar of Huehuetla Tepehua. PhD Thesis, UMI, Ann Arbor.