1. Insect-caused loss to western white pine cones.;BARNES;U.S.D.A. Forest Service Intermountain Forest and Range Experimental Station, Research Note,1962
2. Jays and oaks: an eco-ethological study of a symbiosis.;BOSEMA;Behaviour,1979
3. Model relating unsound seed and embryonic lethal alleles in self pollinated pines.;BRAMLETT;Silvae Genetica.,1971
4. Iteroparous animals that skip opportunities for reproduction.;BULL;American Naturalist,1979
5. Periodical insects.;BULMER;American Naturalist,1977