United States. Children's Bureau
, Jenss, Rachel M. (Rachel Marie), 1903-1993
and Souther, Susan Paige, 1896-.
Methods of Assessing the Physical Fitness of Children, Bureau Publication No. 263 ,
Washington, D.C:
Government Printing Office,
1940, https://fraser.stlouisfed.org/title/8537,
accessed on January 6, 2026.