Z'graggen, John Anton. 1969. Classificatory and Typological Studies in Languages of the Madang District, New Guinea. (Pacific Linguistics, 19.) Canberra: Australian National University.
@book{sinnemakizeromarking-Zgraggen1969, address = {Canberra}, author = {Z'graggen, John Anton}, publisher = {Australian National University}, series = {Pacific Linguistics}, title = {Classificatory and Typological Studies in Languages of the Madang District, New Guinea}, volume = {19}, year = {1969} }