Sahota, T. S., and F. G. Peet. 1988a. Changes in the quality of scolytid populations: their determination and relation to scolytid outbreaks. Pages 25-33 in T L. Payne and H. Saarenmaa, Integrated control of scolytid bark beetles. Virginia Polytechnic and State University, Blacksburg, Virginia. 355 p.