Pieters, P. E. (1975). Land instability in the Numbugu village area between the Ufim and Biapim rivers, Morobe District. Office of Minerals and Energy.
Chicago Style (17th ed.) CitationPieters, P. E. Land Instability in the Numbugu Village Area Between the Ufim and Biapim Rivers, Morobe District. [Port Moresby]: Office of Minerals and Energy, 1975.
MLA (9th ed.) CitationPieters, P. E. Land Instability in the Numbugu Village Area Between the Ufim and Biapim Rivers, Morobe District. Office of Minerals and Energy, 1975.
Warning: These citations may not always be 100% accurate.