Your class readings for GPS are located in the GPS reader. You're expected to bring the reader to class, and do our class readings using that reader.
The sources listed on this page show the class readings from your GPS reader in context as an original publication. When the class reading is a smaller selection or chapter from within a larger text, you can use this list to access the full text. This might be helpful if you want to read more beyond the class reading, or if you're curious about what the other chapters in a book are about.
Some of these sources are available online, and some are print books that you can find on the shelf. In some cases, the library source linked here is a different edition than the one used in your class readings, indicated in the notes.