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Hullo 385 borehole
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References (3)
Nõlvak, J. 1980. Chitinozoans in biostratigraphy of the northern East Baltic Ashgillian. A preliminary report. Acta Palaeontologica Polonica 25 (2), 253-260. | DETAILS
Nõlvak, J. 1984. Распространение кислотоустойчивых микрофоссилий в разрезах ашгилла Северной Прибалтики [Distribution of acid-resistant microfossils in the northern East Baltic Ashgillian]. Deponeeritud VINITI-sse. 1-70. | DETAILS
Nõlvak, J., Grahn, Y. 1993. Ordovician chitinozoan zones from Baltoscandia. Review of Palaeobotany and Palynology 79, 245-269. | DOI | DETAILS