Trefry and Trefry 1967

Trefry, David and Trefry, J. F. 1967. Kuman Language Course. Port Moresby, Papua New Guinea: Summer Institute of Linguistics.

@book{Trefry-and-Trefry-1967,
  address   = {Port Moresby, Papua New Guinea},
  author    = {Trefry, David and Trefry, J. F.},
  publisher = {Summer Institute of Linguistics},
  title     = {Kuman Language Course},
  year      = {1967}
}