The AHA Guide to Historical Literature will get you started on any time period anywhere in the world. The link is to the online version. You might find it easier to start with the print version to see how it is organized.
This entirely new edition of a keystone reference is the place to start researching any topic in any field of history. Hundreds of historians from around the world have selected and provided commentary on the best and most useful works in their fields. It is divided into sections arranged by chronology and national and regional history, with each section introduced by a brief historiographical essay. And it also contains expanded coverage of Africa, Asia, and North and South America.