The challenge of change : 18th Survey Congress, Lae, 1983.

Ngā tūemi rite

• The Association of Surveyors of Papua New Guinea 23rd Survey Congress, June 26th - 29th, 1988.
  I whakaputaina: (1988)
• Twenty-fourth survey congress 'affordable modern technology systems for developing countries'.
  I whakaputaina: (1989)
• Lae housing, population, education and training, economic activity and migration
  I whakaputaina: (1978)
• The development of the practice of surveying in an emerging country papers to be presented at the Fourth Survey Congress, Port Moresby, 14th-18th July 1969
  I whakaputaina: (1969)
• Survey directions.
  I whakaputaina: (1975)