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Systematophora Klement and Polystephanosphaera Sarjeant
| Sarjeant, W.A.S. | |
| 1961b | |
| Journal of Paleontology vol.35 pp.1095-1096 | |
| Systematophora Klement and Polystephanosphaera Sarjeant |
Sarjeant, W.A.S., 1961; Systematophora Klement and Polystephanosphaera Sarjeant. Journal of Paleontology vol.35 pp.1095-1096