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}
}