Laycock, Don (n.d.) Notebook C7: Selected Research Papers of Don Laycock on Languages in Papua New Guinea: Seti, Seta, Urim, Minidien. Don Laycock (compiler); Don Laycock (researcher). n.d. Pacific And Regional Archive for Digital Sources in Endangered Cultures (PARADISEC). oai:paradisec.org.au:DL2-007.