The Correlation of Abilities of High School Pupils David Emrich Weglein

Excerpt from The Correlation of Abilities of High School Pupils: A Dissertation Submitted to the Board of University Studies of the Johns Hopkins University in Conformity With the Requirements for the Degree of Doctor of Philosophy, Это и многое другое вы найдете в книге The Correlation of Abilities of High School Pupils (David Emrich Weglein)