- Hoekstra, P. E., E. P. Merkel, and H. R. Powers. 1961. Production of seeds of forest trees. Pages 227-232 in Alfred Stefferud (ed.), Seeds. United States Department of Agriculture, Yearbook, Washington, D. C. 591 p.
- Powers, J., H.R., R. Belanger, W. Pepper, and F. Hastings. 1992a. An observation of differential mortality caused by the southern pine beetle within 11-year old rust-resistant loblolly pine from different geographical seed sources. Page 170 In Douglas C. Allen and L.P. Abrahamson (eds.), Proceedings: North American Forest Insect Work Conference, Denver, Colorado, March 25-28, 1991. United States Department of Agriculture, Forest Service, Pacific Northwest Research Station (Portland, OR), General Technical Report PNW-GTR-294.
- Powers, J., H.R., R. Belanger, W. Pepper, and F. Hastings. 1992b. Loblolly pine seed sources differ in susceptibility to the southern pine beetle in South Carolina . Southern Journal of Applied Forestry 16:169-174.
- Powers, J. 1995. Spatial and temporal dynamics of the Douglas-fir beetle (Dendroctonus pseudotsugae Hopk.) in the Detroit Ranger District, Oregon: a landscape ecology perspective. Unpublished thesis, Oregon State University, Corvallis, Oregon. 107 pp.
- Powers, J., P. Sollins, M. Harmon, and J. Jones. 1999. Plant-pest interactions in time and space: A Douglas-fir bark beetle outbreak as a case study . Landscape Ecology 14:105-120.