Paradise of Childhood. _Edward Wiebe_. Pages 30-38.
Law of Childhood. _W. N. Hailmann_. 38, 39.
Kindergarten Guide. _Kraus-Boelte_. 145-237.
Koehler's Kindergarten Practice. Tr. by _Mary Gurney_. 6-9.
The Kindergarten. _H. Goldammer_. 116-54.
Kindergarten Culture. _W. N. Hailmann_. 68-70.
Kindergarten and Child-Culture. _Henry Barnard_. 210, 255, 257.
Prang Primary Course in Art Education. Part I. _Mary D. Hicks_,
_Josephine C. Locke_.
Color in the School-Room. _Milton Bradley_.
Elementary Color. _Milton Bradley_.
Color Teaching in Public Schools. _Louis Prang_, _J. S. Clark_,
_Mary D. Hicks_.
Color, an Elementary Manual for Students. _A. H. Church_.
The Principles of Harmony and Contrasts of Colors. _M. E. Chevreul_.
Students' Text-Book of Color. _O. N. Rood_.
Suggestions with Regard to the Use of Color. _Prang Ed. Co._