National Renewable Energy Laboratory NREL Publications Database [http://www.nrel.gov/publications/] - The NREL Publications Database contains bibliographic information about publications developed or written by NREL staff and subcontractors. Search the database for publications from 1977 to the present on subjects related to renewable energy and energy-efficient technologies. Many publications are available electronically as Adobe Acrobat PDFs.
The database includes:
In addition to publications, NREL also has an online photo library.