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bookAt: Int. Struct. Foss. Veg., Edinburgh; London, Adam & Charles Black [Edinburgh]; Longman [London] By: Witham H. T. M.
journalAt: Palaeobotanist, 65, 2 By: Doweld A. B.
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journalAt: Journal of the Faculty of Science of the Hokkaido Imperial University, Series, 4, Geology and mineralogy, 2, 1 By: Ôishi S.
journalAt: Meddelelser om Grønland, Series, Geoscience, 23 By: Bennike O.