Helping teachers change their behavior, an inservice training project utilizing sound filmstrips, interaction analysis, self-directed experimentation:

Mode of access: Internet.

A century of change : a photographic history and analysis of vegetation conditions, El Morro National Monument, 1891-1983 /

"February 25, 1984."

Europe in the nineteenth century; a documentary analysis of change and conflict,

v. 1. 1815-1870.--v. 2. 1870-1914.