Fries, J., Crapo, L. Vitality and aging. San Francisco: W. H. Freeman and Company, 1981 172 p. 0-7167-1309-8.
Fries, J., Crapo, L. Vitality and aging. San Francisco: W. H. Freeman and Company, 1981 172 p. 0-7167-1309-8.
Fries, J., Crapo, L. (1981) Vitality and aging, San Francisco: W. H. Freeman and Company 172 p. 0-7167-1309-8.
Fries, J., & Crapo, L. (1981). Vitality and aging. Implications of the rectangular curve. San Francisco: W. H. Freeman and Company, 172 p.
Fries J, Crapo L. Vitality and aging: Implications of the rectangular curve. San Francisco: W. H. Freeman and Company; 1981. p. 172 p. ISBN: 0-7167-1309-8.