MacDonald, A. Experimental study of children : including anthropometrical and psycho-physical measurements of Washington school children, and bibliography : chapters from the Report of the Commissioner of education for 1897-98 : chapters 21 and 25 : whole number 248 / by Arthur MacDonald , United States Bureau of education; A. MacDonald .— : Government printing office, 1899 .— 332 с. — Lang: eng .— URL: https://rucont.ru/efd/131425 (дата обращения: 31.05.2024)