An experimental study to determine the relative difficulty of the elementary number combinations in addition and multiplication
By: by Harry Vance Holloway, June, 1914
Series: Nineteenth Century Collections Online: Children's Literature and Childhood; Nineteenth Century Collections Online: Children's Literature and Childhood
Publisher: [publisher not identified]
Published: 1915
Place of publication: Place of publication not identified]
Language: eng
Number of pages: 102
Subjects: Arithmetic; Study and teaching; Educational psychology
Notes: "A thesis presented to the Faculty of the Graduate School of the University of Pennsylvania in partial fulfilment of the requirements for the degree of Doctor of Philosophy."

Reproduction of the original from the Teachers College, Milbank Memorial Library, Columbia University.

"Bibliography and references": pages 100-102.