Do History: History Toolkit Provides a few easy-to-understand writings on how to conduct historical (including deed) research and is addressed to beginning historians.

Historic Preservation League of Oregon: Research Resources Page Gives a brief description of what the HPLO can offer and has a few links to websites related to preservation research.

The San Francisco Public Library: Research Resources Useful for Researching Historic Buildings Describes different resources available in and around San Francisco for researching historic buildings.