20 unique, original articles, 350 words. One topic. Well researched.

We are looking for 20 unique articles, all about a single type of service, but for different cities. Some research will be required, source material will be provided as well as document listing the specific requirements of what we are looking for. This is NOT article rewriting or spinning. This is professional writing we are looking for. The quality level would be similar to at least the level your would see at www.about.com. Interested parties will receive the requirement document to review before their final bid.