00543namaa22001812u 4500 Item id = 5308 IDB Library Database 1975 Ukarumpa, Papua New Guinea SIL International 500 pp 21 cm 20170619150137.0 Language Learner's Field Guide Healey, Alan Editor LANGUAGE ACQUISITION LANGUAGE AND LANGUAGES--STUDY AND TEACHING LINGUISTICS--FIELD WORK 0726303569 Publication status: Published 63613 63587