If you are not sure what your topic is all about, check it out in a dictionary or encyclopedia. For a recent overview of your topic try a handbook or a yearbook. They can have all kinds of facts, figures and precise information.
Books are a good starting point.
Use the Any Words search in the library's catalogue. You can search on words like fluoride . Looking through journals in the hope of finding relevant material is time consuming. It is better to use the databases or printed indexes to find journal articles on your topic. More Info Make sure you use the right words for your search.