1. Bancroft , Jessie H. 1914. The Posture of School Children, Vol. XII, 327New York: The Macmillan Company.
2. Brownell , Clifford Lee . A Scale for Measuring the Anterior Posterior Posture of Ninth Grade Boys, 52New York: Bureau of Publications, T. C. Columbia University. Contributions to Education, No. 325, VIII
3. Work-A-Day Tests of Good Posture