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2. Ion beam etching in palynology;Blackmore;Grana,1984
3. Chemical structure of the exine of pollen walls and a new function for carotenoids in nature;Brooks;Nature (Lond.),1968
4. Recent advances in the chemistry and geochemistry of pollen and spore walls;Brooks;Trans. Bose Res. Inst.,1977
5. Betula pollen grain substructure revealed by fast atom etching;Claugher;Pollen Spores,1987