You will find most of these books in McKeldin Library. Most of them will be in McKeldin Stacks or Folios (oversize), and these items you can check out. Some of these books are in McKeldin Reference. Reference materials you can't check out, but you can read them as long as McKeldin library is open. Finally some of these items are in Hornbake Library Rare Book Collection. These means that these items are either very old or in some way especially special and have to be handle with special care. Please check their visitation rules and hours.