Caves on scenic Postmarks of Japan. Part 1. First Series 1931- 1940. 1984. 17: 13.
Caves on scenic Postmarks of Japan. Part 2. Secon Series 1948 onwards. 1984. 17: 14-18.
Carl Peter Thunberg and cave Swiftlets. 1992. 38: 16.
South African scientist /Dr. Robert broom, 1866-1951. 1992. 38: 24.
Gua=Cave.... 1994. 43: 19.
Still more on Elephant cave, Bali. 1995. 47: 6.
Cave postmarks of Malaysia. 1995. 47: 10-12.
Cave postmarks of Malaysia. 1996. 49: 10-11.
Some Japanese ‘karstic’ landscapes. 1983. 11: 3.