Hello,
We have some of the Schaum's guides. I checked and we do have Schaum's outline of theory and problems of college mathematics (see http://catalog.lib.unomaha.edu/record=b2212385*eng) as an ebook. However, you would need to be a current student or staff member of UNO to access it from off campus.
If you come to the library in person, you could access it from one of our public computer stations. You could also access one of our databases with practice tests for standardized tests. Neither of them include Schaum's guides but they do have mathematics practice tests and guides for the CLEP and AP programs that might be helpful.
If you live in Omaha, the Omaha Public Library has the LearningExpressLibrary database that has practice tests for CLEP and AP that might also be helpful to you.
Hope this helps. Good luck.
Melissa