Gnetalesaccus
- Citations total:
- 3
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| details | Permian | Oklahoma | Clapham,W.B. Numerical analysis and Group Formation in palynology. | 1972 | |
| details | Late Permian | Oklahoma | Clapham,W.B. Evolution of Upper Permian terrestrial floras in Oklahoma as determined from pollen and spores. | 1970 | |
| original | Early Guadalupian | Oklahoma | Clapham,W.B. Permian miospores from the Flowerpot Formation of western Oklahoma | 1970 |