Venezuelatuya. Though this is a tourist portal, to Venezuela it presents a wealth of detailed studies of many cities and microregions of the country with minimal advertising. English text available. (djr)
http://venezuelatuya.com/eng.htm

The oil camps of Venezuela.   A fascinating study of the camps and the people who used to work in them. Dozens of year books and other historical documents. (djr)
http://www.randytrahan.com/ocov/