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Author - title
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| details | Early Proterozoic | Canada(Ontario) | Pflug,H.D. et al. Palynostratigraphy in Phanerozoic and Precambrian metamorphic rocks. (In: Proceedings of the 9th Alfred Wegener Conference-IGCP Project 157, M.Schidlowski, editor) | 1992 | |
| details | Canada(Ontario) | Sarjeant,W.A.S. et al. The Micrhystridium and Veryhachium Complexes (Acritarcha: Acanthomorphitae and Polygonomorphitae): A taxonomic reconsideration. | 1994 |