Encyclopedia of Aging - Encompasses all aspects of aging, covering a variety of disciplines including biology, medicine, economics, law psychology, sociology and history, and also explores related issues such as religion, spirituality, and ethics.
Encyclopedia of Population - Provides coverage of demographic topics both in the core field and in neighboring disciplines. Encompasses the large-scale changes in emphasis and research directions in population studies during the last 20 years. Topics covered include: rapid demographic expansion in poor countries, low fertility rates, immigration, problems of old-age support, the environmental impact of dense population.
Blackwell Encyclopedia of Sociology Online - Contains specially-commissioned entries on sociological theories, research, and contemporary developments in the field. Updated three times a year, this online encyclopedia is searchable by subject, people, periods, places, and topics.