One of my favorite things to do when I get a new book for my research is to check the bibliography. Learning what resource materials these researched used help me find additional materials. Many times my secondary source leads me right to a primary one. There have been times when I’ve gotten all the pertinent information on a particular topic, and sometimes I find additional data the researchers omitted. I’ve even been able to find sources for new areas of research. There is a lot of research that has been done on oral hygiene. There are countless primary sources that contain advice on how to keep the mouth clean and…