Template:Ladd, 1959
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- Ladd, H.S. 1959. Reexamination of Palaeocreusia devonica Clarke. Journal of Paleontology 33(5): 963–964. JSTOR
- Date of publication: September 1959
- ZooBank: DE925802-74E2-4EC0-B636-021F24BB6EE3
- No new names