Meehan, T. P., Wolff, P. L., Baer, D. J., Rumpler, W. V., Raphael, W. V., Raphael, B. R., and Oftedal, Olav T. 1991. "Methods of estimating body composition, with preliminary observations on the relationship between obesity and fertility." 47–48. Chicago, IL: Lincoln Park Zoological Gardens.