Ethnologue. 

 - Hunting Beach, California :  Wycliffe Bible Translators,  1978. 
 - xii, 417 p. 
<br/><br/><label>LCCN: </label>55052310     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Language and languages--Collected works.<br/>Language and languages--Statistics--Collected works.