Chapter 9 is talking about using the library to your advantage. That there is a wealth of information relevant to your topic. Once you know your topic and are looking for books about the topic there is going to be a whole section or related subjects and information. When at the library use the periodicals room to help locate your sources there will be magazine, newspapers,scholarly and professional journals and you can brows threw all of them. Look in to the library reference room to help your self find sources and a range of information about your topic. There are a lot of different types of bibliographies such as trade, general and specialized. "How do you use a bibliography?1- you first locate your subject through the index or page headings 2- if it provided, read background information about the subject. 3- review the bibliography to identify sources that are judged by the author of the subject.4- entries in specialized bibliographies are often written by leading scholars.