Google Scholar can be easily configured to tell you which of your search results can be accessed for free via the UW Libraries, and will even provide a direct link to the resource in the catalog. It is a good idea to search UW sources if you can't find what you need with Google Scholar. Unfortunately, Google Scholar cannot show you everything available.
Directions for connecting Google Scholar with UW Libraries are available at the link below:
Ulrichsweb (commonly known as Ulrichs) provides information about journals themselves so you can find out if it is peer-reviewed and where it is indexed, among other pieces of data.