1. AGNEW, A.: Upland Kenya Wild Flowers, 827 p., 800 Abb. Oxford: University Press 1974.
2. ALLEN, B.: Fern Gaz. 11, 163–164 (1975).
3. Anonymus: Bull. Amer. Fern Soc. 2, 3–4 (1975).
4. BANGE, C.: Bull. Mens. Soc. Linn. Lyon 42, 242–244 (1973).
5. BANKS, H.: Taxon 24, 401–413 (1975).