Additional Sites
- Energy Information Administration
- International Atomic Energy Agency
- International Trade Administration
- OECD
- National Geophysical Data Center
- World Resources Institute
- World Health Organization (WHO)
- National Oceanic and Atmospheric Administration (NOAA)
Additional Reading
Google Hacks: Tips and Tools for Finding the World's Information by Rael Dornfest
Additional Tools
It could be useful to build a custom search engine. Building a custom search engine allows you to search only websites you select. To build a custom search engine, visit this site: Google Custom Search Engine