1. The Cambridge pollen reference collection;Andrew,1970
2. Växtpaleontologiska studier på Åland;Backman;Acta Soc. Flora et Fauna Fennica,1965
3. A new method for the preparation of clay-rich sediment samples for palynological investigation;Bates;New Phytol.,1978
4. Past and present vegetation of the Isle of Skye—a palaeoecological study;Birks,1973
5. River terraces of the Oxford area;Briggs,1976