ACCESS Science
AccessScience is an authoritative and dynamic online resource that contains incisively written, high-quality reference material that covers all major scientific disciplines. An award-winning gateway to scientific knowledge, it offers links to primary research material, videos and exclusive animations, plus specially designed curriculum maps for teachers.
Science in Context
Science in Context features authoritative information for assignments and projects, and provides detailed coverage of popular subjects. From earth science and life science, to space, technology, mathematics and science history and biography, this revolutionary, curriculum-oriented online experience is designed to boost achievement for students and researchers.
Reference sources can provide you with valuable information such as:
Background information
Important figures
Dates, places, and people
Definitions and key terms
Lists of additional sources (articles, books, etc.)
They are an excellent way to begin your research by allowing you to become familiar with the topic in preparation to choose the best articles, books, and additional resources.
The environmental debate: A documentary history: With timeline, glossary, and appendices by 
Encyclopedia of the U.S. government and the environment : history, policy, and politics by 
Encyclopedia of organic, sustainable, and local food by 
