Grenfell, B. T. 1988. Gastrointestinal nematode parasites and the stability and productivity of intensive ruminant grazing systems. Philos T Roy Soc B 321:541-563.
Grenfell, B. T. 1988. Gastrointestinal nematode parasites and the stability and productivity of intensive ruminant grazing systems. Philos T Roy Soc B 321:541-563.