You'll find these print sources in the reference section on the main floor of the library! As you use these and other reference sources, keep these tips in mind:
The following links will take you to large digital collections of subject encyclopedias. The Gale Virtual Reference Library is an especially good place to start for STS courses, as it includes the Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures, Mcgraw-Hill Dictionary of Science & Technology, Science and Its Times, and the Dictionary of Scientific Biograph