1. Foraging ecology of Indian crested porcupines (Hystrix indica) in Negev habitats: final report;Alkon,1983
2. Evidence for apostatic selection by wild passerines;Allen;Behaviour,1968
3. Potato production in Alberta;Andrew;Alberta Agric., Agdex 258/20-3,1976
4. Optimal foraging: the marginal value theorem;Charnov;Theor. Popul. Biol.,1976
5. Man versus pests;Conway,1981