数量xxix, 762 p. illus. 26 cm.
一般注記"Based on a workshop held in Boston, Massachusetts, December 1-5, 1968 [and] sponsored by the National Institute of Child Health and Human Development and the Center for Population Studies of the Harvard University School of Public Health."
"Conducted pursuant to contract no. PH-43-68-1456 with the National Institutes of Health, Department of Health, Education, and Welfare."