1. Anonym, 1976: Report on Forest research. London, U. K., 26–28.
2. Baumgartner, D. M. (ed.), 1975: Management of lodgepole pine ecosystems: symposium proceedings, 2 vols. 825 p. Coop. Ext. Serv., Wash. State Univ., Pullman.
3. Brazier, J. D., 1980: A report on the effects of provenance on the timber properties of lodgepole pine. Swedish Univ. of Agric. Sciences, Dept. of Forest Genetics. Research Notes30, 181–207.
4. Critchfield, W. B., 1957: Geographic variation inPinus contorta. Maria Moors Cabot Foundation, Publ. no. 3, 118 pp.
5. Critchfield, W. B., 1980: The genetics of lodgepole pine. USDA, Forest Service. Research Paper WO-37, 57 pp.