Start here with this excellent source for a basic understanding of scientific and technical issues. This is an enhanced electronic version of the 20 volume McGraw-Hill Encyclopedia of Science and Technology. (503 M147)
Start here first with our online reference collection which covers most topics and includes audio and video links as well. Scroll through all the resutls, each reference offers a slightly different perspective.Citation formats to each source is located at the bottom of the web page.
Includes many pro and con issues related to your topicand provides a chronology of the topic as well.