Biological metaphor and cladistic classification an interdisciplinary perspective (Univ. of Pennsylvania Press, 1987)
Papers from a symposium on Biological Metaphor Outside Biology, held Mar. 4-5, 1982 and an Interdisciplinary Round-Table on Cladistics and Other Graph Theoretical Representations, held Apr. 28-29, 1983, both at the American Philosophical Society's Library in Philadelphia