Major Works of Leonard P. Ayres

• Medical Inspection of Schools, with L. H. Gulick, 1908 [av][1913 repr, av]
• Laggards in our Schools, 1909 [bk, av] [1913 repr, av]
• Open Air Schools, 1910 [bk, av]
• Seven Great Foundations, 1911 [bk]
• The Measurement of Educational Processes and Product, 1912 [av]
• Some conditions affecting problems of industrial education in 78 American school systems, 1914 [bk, av]
• Health Work in the Public Schools, with May Ayres, 1915 [av]
• A Measuring Scale for Ability in Spelling, 1915 [bk, av]
• The Public Library and the Public School, with A. McKinnie, 1916 [av]
• School Buildings and Equipment, with May Ayres, 1916, [av]
• School Organization and Administration, 1916 [av]
• Cleveland School Survey, summary, 1917 [bk, av]
• "History and Present Status of Educational Measurements", 1918, 17th Yearbook of Nat Society for Study of Education, p.1 [av]
• The War with Germany, a statistical summary, 1919 [bk, av, uks].
• Index Number for State School Systems, 1920 [bk, av]
• Price Changes and Business Prospects, 1921 [av]
• Nature and Status of Business Research, 1922 [av]
• The Prospects for Building Construction in American Cities, 1922 [av]
• Cleveland Survey of the Administration of Criminal Justice, 1923 [av]
• The Economics of Recovery, 1933
• Turning Points in Business Cycles, 1940. 

Resources on Leonard Ayres

• "Leonard P.Ayres: An appreciation" by W.R. Burgess, 1946, JASA
• (1) (2)
• Wiki