Lotus Delta Coffman

Illinois School Survey, a coperative investigation of school conditions and school efficiency, initiated and conducted by the teachers of Illinois in . of all the children of all the people

Lotus Delta Coffman

Воспроизведено в оригинальной авторской орфографии.

The social composition of the teaching population, by Lotus Delta Coffman

Lotus Delta Coffman

Воспроизведено в оригинальной авторской орфографии.

Teacher training department in Minnesota high schools, by Lotus D. Coffman

Lotus Delta Coffman

Воспроизведено в оригинальной авторской орфографии.