1. Addison, P.A., Kennedy, K.A., Maynard, D.G., 1984. Effects of sour gas processing on a forest ecosystem in west central Alberta. Canadian Forest Service Information Report, NOR-X-265
2. Notes on the impact of air pollution (SO2 and Pb) on spider populations in North Zealand;Clausen;Denmark. Entomol. Medd.,1984
3. Digging out the `digging-in' effects of pitfall traps: influences of depletion and disturbance on catches of ground beetles (Coleoptera: Carabidae);Digweed;Pedobiologia,1995
4. Ground beetle populations near a kraft mill;Freitag;Can. Ent.,1973
5. Pitfall trapping as a method for studying populations of Carabidae (Coleoptera);Greenslade;J. Anim. Ecol.,1964