United States. Central Intelligence Agency, CIA World Fact Book, 2004 — Papua New Guinea (2004)
“ Papua New Guinea is richly endowed with natural resources, but exploitation has been hampered by rugged terrain and the high cost of developing infrastructure. Agriculture provides a subsistence livelihood for 85% of the population. Mineral deposits, including oil, copper, and gold, account for 72% of export earnings. The economy has faltered over the past four years. ”
