Vol. s5-33, Issue 198, 1937June 01, 1937 EDT
Kansas Permian Insects; Part 19, the Order Protoperlaria (Continued), the Family Probnisidae
Kansas Permian Insects; Part 19, the Order Protoperlaria (Continued), the Family Probnisidae
Robin John Tillyard,
Tillyard, R. J. (1937). Kansas Permian Insects; Part 19, the Order Protoperlaria (Continued), the Family Probnisidae. American Journal of Science, s5-33(198), 401–425. https://doi.org/10.2475/ajs.s5-33.198.401