2008, Ivan Zinoviy Holowinsky, Psychology in Ukraine: A Historical Perspective, University Press of America, →ISBN (10), →ISBN (13), chapter v: “Early Soviet Psychology and Pedology”, page 30:
Heurta (as reported by Depaepe, 1985) suggested that the field of study of pedology should be divided into three areas, which he named: pure, applied and auxiliary. Some examples of these areas of study include: pure-anatomy of children, physiology, child pathology, characterology, paedometry, psychosomatic study; applied-child care, paediatry, art of child evaluation; auxiliary-anatomy, histology, cytology, biophysics, general biology, psychology, and sociology.
