Language variation and survey techniques. 

 - Ukarumpa :  Summer Institute of Linguistics,  1977. 
 - 352 p. :  ill., maps ;  24 cm. 
 - Workpapers in Papua New Guinea languages  vol. 21 .
<br/><br/><label>ISBN: </label>0726305073 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Language and languages--Variation.<br/>Language surveys.<br/>Language surveys--Papua New Guinea.<br/>Lexicostatistics.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Papua New Guinea--Languages.