Google Scholar is a great starting place for initial research. Unlike a regular Google search, Google Scholar attempts to connect you with more "academic" content then information typically found on the web.
As with any web searching important evaluation work will still need to be done on each of the resources you are looking at. Use the following criteria to evaluation the information from Google Scholar or other web searches.
GENERAL
BY REGION
Africa
Asia
Latin America / South America
BY DEVELOPMENT ISSUE/PROBLEM