Origins of pest, parasite,disease and weed problems : the 18th Symposium of the British Ecological Society, Bangor,12-14 April, 1976 /
edited by J.M. Cherrett and G.R.Sagar. -
- Oxford : Blackwell, 1977
- x,413 p. : ill. -
- Symposium of the British Ecological Society; 18 .