constant and variable errors of educational measurements.
Series: Illinois. University. College of Education. Bureau of Research and Service. Bulletin -- no. 15.; Bulletin (University of Illinois at Urbana-Champaign. College of Education. Bureau of Research and Service) -- no. 15.; University of Illinois bulletin -- v. 21, no. 10.
Publisher: University of Illinois
Published: 1923
Place of publication: Urbana
Language: eng
Number of pages: 30
Subjects: Educational tests and measurements.
Notes: Illinois. University. Bulletin, v. 21, no. 10.