BibTeX

@book{Lean1991,
  address   = {Lae},
  author    = {Lean, Glendon A.},
  publisher = {Papua New Guinea University of Technology, Department of Mathematics and Statistics},
  title     = {Counting systems of Papua New Guinea. 2nd edn. in 17 vols. Mimeo},
  year      = {1991},
  sections  = {None}
}