Books published before 2004, reference works, and theses written at WU (master’s theses, diploma theses, and doctoral theses/dissertations only) are shelved on level -2. You can also find bound volumes of current and older periodicals on this level.
The level is divided in two areas: books and periodicals. It is open access, and titles are shelved numerically. Periodicals cannot be checked out, but scanners are available so that individual articles can be scanned and saved to a flash drive or sent as an email attachment.
The book pictured in the example on the right is located on level -2 in the book area, under shelf mark 293261-M.