Bowker, Lee H.
| 1972 | "The Genus Pediocactus" in The Cactus and Succulent Journal of Great Britain |
| 1972 | "The Genus Sclerocactus" in The Cactus and Succulent Journal of Great Britain |
| 1971 | "Habitat Notes on Selected North American Cacti" in The National Cactus and Succulent Journal |
| 1969 | "Notes on Selected Cacti from the Plateau Country of the Western United States" in The National Cactus and Succulent Journal |