ArtLex: Neoclassicism
http://www.artlex.com/ArtLex/n/neoclassicism.html
This online dictionary defines the ideas behind Neoclassicism and provides examples from key artists of the period.

Paul Hindemith
http://w3.rz-berlin.mpg.de/cmp/hindemith.html
A brief description of the life and times of this important artist is presented in this installment of the Classical Music Pages.