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 International Commission on the Teaching of Mathematics and International Commission on the Teaching of Mathematics. Committee I and International Commission on the Teaching of Mathematics. Committee II,Mathematics in the elementary schools of the United States,,G.P.O.,1911,Bulletin,,,,https://cir.nii.ac.jp/crid/1130000798184599808