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A taxonomic study of the milliped family Spirobolidae (Diplopoda; Spirobolida)
By Keeton, William
Memoirs of the American Entomological Society 17: 1–146., 1960
Cite: 905156 with citation markup [cite:905156]
Keeton, William T. (1960). A taxonomic study of the milliped family Spirobolidae (Diplopoda; Spirobolida). Memoirs of the American Entomological Society 17: 1–146.

A detailed study of the family Spirobolidae, with keys and copious illustrations.

Online Link
Available here https://www.biodiversitylibrary.org/item/120082#page/3/mode/1up