The Oil Exploration Work in Papua and New Guinea Conducted by the Anglo-Persian Oil Company on Behalf of the Government of the Commonwealth of Australia, 1920-1929: pt. 5. A contribution to the tertiary geology of Papua, 1929-1930. pt. 6. A brief review of the oil prospecting work at Upoia, 1911-1920. pt. 7. A critical study of the geology and oil prospects of Papua and New Guinea as revealed by the work of the Anglo-Persian Oil Company, 1920-1929