sponsored by the National Institutes of Health and held at the School of Medicine, University of Minnesota--Duluth, Duluth, Minnesota, August 1-3, 1984 ; edited by Edwin W. Haller, Ruth A. Myers
J. Richard Udry, Earl E. Huyck, co-chairmen and editors ; conducted under the auspices of the Center for Population Research, National Institute of Child Health and Human Development, National Institute of Health, U.S. Department of Health, Education, and Welfare