1. Advisory Board for the Research Councils (1979) Taxonomy in Britain. Her Majesty’s Stationery Office, London.
2. Anonymous (1974) Trends, priorities and needs in systematic and evolutionary biology. Syst Zool 24: 416–39.
3. Ashby E (1978) Reconciling Man with the Environment. Oxford University Press, London.
4. Ayala R J (1972) Darwinian versus non-Darwinian evolution in natural populations of Drosophila Proc Sixth Berkeley Symp Math Stat Prob 5: 211–36.
5. Barnett S A (1988) Biology and Freedom. Cambridge University Press, Cambridge.