著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Thies, Lavern John",The time factor in arithmetic texts : a detailed analysis of actual pupil-time required by two arithmetic texts for grades five and six,,"College of education, University of Iowa",1926,"University of Iowa, monographs in education",,,,https://cir.nii.ac.jp/crid/1130000796691178496