Cabrera, H. 1978. Phloem structure and development in lodgepole pine. Pages 54-63 in A. A. Berryman, G. D. Amman, R. W. Stark, and D. L. Kibbee (eds.), Theory and practice of mountain pine beetle management in lodgepole pine forests. Symposium, Pullman, Washington, 25-27 April. University of Idaho, College of Forest Resources. 220 p.