I <3 Google.  Really.  It is chock full of information.

But Google and library databases are very different types of resources.

1. Google calculates the number of times a particular word or phrase appears in a website's metadata;
2. Google uses click rankings (have you heard about the Santorum problem?); and
3. Google accepts $$ to display certain websites on the first or first few pages of results.

The money-making potential for a given topic can seriously skew your Google search results.  

If you decide you'd like to use Google for your initial search, please take this information into account.  When in doubt, use Google Scholar.  Google Scholar searches against patents/trademarks, governmental organizations, and the indexes and contents notes of peer reviewed material.