Chipped Stone Tools in Formative Oaxaca, Mexico: Their Procurement, Production and Use. William J. Parry. Prehistory and Human Ecology of the Valley of Oaxaca, Volume 8. Kent V. Flannery and Richard E. Blanton, general editors. Memoir Number 20. Museum of Anthropology, University of Michigan, Ann Arbor, 1987. xv + 178 pp., tables, figures, plates, appendix, biblio. $18.00 (paper).