International Symposium on Forest Tree Physiology Harvard University & Thimann, K. V. (1958). The physiology of forest trees: A symposium held at the Harvard Forest, April 1957. Ronald Press.

International Symposium on Forest Tree Physiology Harvard University and Kenneth Vivian Thimann. The Physiology of Forest Trees: A Symposium Held at the Harvard Forest, April 1957. New York: Ronald Press, 1958.

International Symposium on Forest Tree Physiology Harvard University and Kenneth Vivian Thimann. The Physiology of Forest Trees: A Symposium Held at the Harvard Forest, April 1957. Ronald Press, 1958.