1. Lower and Middle Devonian spores of north and central Vestspitsbergen;Allen;Palaeontology,1965
2. Evolution of the psilophyte paleoflora;Axelrod;Evolution,1959
3. Upper Devonian (Frasnian) spores from the Carnarvon Basin, Western Australia;Balme;Palaeobotanist,1962
4. Upper Devonian spores from the Canning Basin, Western Australia;Balme;Micropaleontology,1962
5. Devonian megaspores from Arctic Canada;Chaloner;Palaeontology,1959