New Zealand

• Marcus Thomas (2017): Caves: Exploring New Zealand’s Subterranean Wilderness,
  312 pages, colour photos. Whio Publishing, Hardback, Jul 2017, ISBN-13: 9780473382797.
  at nhbs.com
• J.A. Kenny, B.W. Hayward (2010): Karst in Stone. Karst landscapes in New Zealand: A case for protection Geological Society of New Zealand Guidebook 15, 40 p. researchgate