1. (opens in a new window)Palynological Database - Palynological Database (PalDat)
2. (opens in a new window)Pollen Atlas
3. (opens in a new window)Pollen Wiki
4. (opens in a new window)Global Pollen Project
5. (opens in a new window)Pollen Key
6. (opens in a new window)Catalogue of Pollen Types
7. Sawyer, R. and Pickard, R. S. (1981) Pollen identification for beekeepers. University College Cardiff Press.