If you find a particular website (e.g. Internet Archive or the Library of Congress) difficult to search, try creating your own search engine for that site using Google.
Go to the Google search bar in your browser and enter your search terms (e.g. circus history).
Add the following to the end of your site: site:loc.gov (where you can replace "loc.gov" with any website you want to search or just add a domain, e.g. site:.edu where you limit results to only webpages from American colleges and universities)
So your search terms would look like this:
Results include: Photo, Print, Drawing, Available Online, Circus Performers ...
If it's a published source (Book or Article)
First, try Google to see if there's a digitized copy available elsewhere.
Tip: try putting the exact title in double quotes "like this"
Second, search for the title in Tripod to see if the Tri-Co Libraries have a copy.
Third, try to request a copy via EZBorrow. If there are no copies there, connect to Interlibrary Loan to request a copy from another library.
Any questions? Ask Margaret or Sarah (the librarians for this course) for help.
If it's an unpublished manuscript
Local collections in the Philadelphia area include awesome collections. When you've found something you'd like to see, contact the archive to make an appointment.
These links point to websites that allow for searching across the collections of many different libraries at once. Some (e.g. Internet Archive) also include content that has been submitted by users.