Serbian Lands
Serbian states in the Southeastern Europe and Mediterranean, represented according to historical, geographic, economic and political factors. By David Jovanovic.

Merriam-Webster's Atlas
Map and some basic facts.

Cities/Buildings Database: Yugoslavia
A collection of digitized images of buildings and cities drawn from across time, at Washington University.

Former Yugoslavia, A Map Folio
The Perry-Castañeda Library Map Collection at the University of Texas, Austin.