Laycock, Donald C. 1973. Sepik Languages: Checklist and Preliminary Classification. (Pacific Linguistics: Series B, 25.) Canberra: Research School of Pacific and Asian Studies, Australian National University. iv+129+10pp.
@book{hvLaycockSepik,
address = {Canberra},
author = {Laycock, Donald C.},
pages = {iv+129+10},
publisher = {Canberra: Research School of Pacific and Asian Studies, Australian National University},
series = {Pacific Linguistics: Series B},
title = {Sepik Languages: Checklist and Preliminary Classification},
volume = {25},
year = {1973}
}