A comprehensive sources that covers most countries of the world.
Some 400 entries cover countries (even those as small as San Marino), US states, law systems, judicial bodies and organizations, and concepts such as alternative dispute...
This resources allows searching by title, as well as keyword search and heading search.
In-depth legal research guides that cover different aspects of foreign and comparative law.
Martindale-Hubbell (2005) - summary of tax laws with citations to legislation on a country-by-country basis; Lexis: INTDIG