Health and Population Links
Medline Eight million well organized citations to medical literature. You can search for nutrition and health studies by country, and much else.
The Population Reference Bureau. The number of human beings on the planet and individual countries is important for hunger and poverty. Population: A Lively Introduction is an outstanding introduction to basic concepts and facts about populations, including fertility, mortality, migration and population size and growth (PDF file).
UNICEF has much useful information including PDF versions of its annual reports, including The State of the World’s Children, and The Progress of Nations. The titles describe the books, and both provide analysis and statistics.