Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Blanche, C., P. Lorio, R. Sommers, J. Hodges, and T. Nebeker. 1992. Seasonal cambial growth and development of loblolly pine: xylem formation, inner bark chemistry, resin ducts, and resin flow . Forest Ecology and Management 49:151-165.