For Microbiology, you may be required to use a library resource, Bergey's Manual of Systematic Bacteriology. This is a set of 5 books, and links to each volume's ebook are provided below (note that Volume 2 has 3 parts: A, B, and C). A current CatID/passphrase are required for using these ebooks.
For assistance using Bergey's, see your instructor: they are the microbiology expert! If you have problems logging in or receive any error messages, however, please see your librarian, Anne Marie Gruber.
Rod Library also has Bergey's in print. For more detail and instructions for locating it, see this handout: https://bit.ly/bergeysrodlibrary