Abstract
Abstract
90Sr/Ca ratios were determined in diet and urine samples taken from 40 teenagers during the period February 1965-May 1966. The mean value of the ORurine/food for the period was 1.03 ± 0.03. The small standard error of the mean seems to indicate that by pooling urine from a large number of persons, large individual variation can be eliminated to a satisfactory degree.