The following links for various Federal, State, Not-for-Profit, Educational, and other resources are available for reference.
Federal
National Register of Historic Places
Secretary of the Interior’s Standards for Rehabilitation
NPS Technical Preservation Services: Preservation Briefs
Advisory Council on Historic Preservation (ACHP)
Historic American Buildings Survey (HABS) & Historic American Engineering Record (HAER)
Save America’s Treasures
Preserve America
State
Oregon State Historic Preservation Office
Oregon SHPO: Historic Sites Database
Oregon SHPO: Certified Local Governments (CLG)
Oregon SHPO: Tax Incentive Programs
Oregon Main Street
Private Organizations
National Trust for Historic Preservation
Historic Preservation League of Oregon
Architectural Heritage Center
Educational Resources
Old House Journal
AHC - Resource Directory
Association for Preservation Technology (APTI)
Virginia Preservation Toolkit
Historic Window Repair
NTHP – Historic Wood Window Tip Sheet
Why Old Windows are Green Windows
How to Restore Sash Windows
Preservation Brief 9: The Repair of Historic Wooden Windows
NTHP – Weatherization Guide for Older & Historic Buildings
NTHP – Window Types – Residential Field Guide
Window Repair Preservation Techniques – Kansas State Historical Society
AHC – Resource Directory – Historic Window and Door Repair Contractors