Laurie Burnham, "Studies on Upper Carboniferous Insects: 1. The Geraridae (Order Protorthoptera)", Psyche: A Journal of Entomology, vol. 90, Article ID 042898, 57 pages, 1983. https://doi.org/10.1155/1983/42898
Studies on Upper Carboniferous Insects: 1. The Geraridae (Order Protorthoptera)
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