by University of California Press

1909

by University of California, Berkeley

1923

by University of California, Berkeley

1919

by University of California, Riverside. Citrus Experiment Station

1916

by California. University. Regents

1929

by University of Iowa. College of Education

1924

by University of California, Berkeley. School of Education. Bureau of Research in Education

1922

by University of California (System)

1922

by Columbia University. Libraries

1923

by University of California, Berkeley

1917

by University of California, Berkeley

1920

by University of California (System). Regents

1910