What's a chronology?
According to the Oxford English Dictionary a chronology is "The science of computing and adjusting time or periods of time, and of recording and arranging events in the order of time; computation of time, assignation of events to their correct dates."
A chronology can help you identify a date for a specific event or an era.
What's a bibliography and how can it help you?
A bibliography is a list of books, book reviews, journal articles, reports etc. which have been recommended for a specific topic.
This is a great way to start your research. You can find some excellent books and journal articles.