I think this should work for you, even if you don't own CIV on Steam...
http://storefront.steampowered.com/Manuals/3900/manual.pdf?l=english
You can read it near the end of the pdf.
Thanks, man...what a cool read.
No wonder Civ4 was so great...Soren Johnson just plain GOT IT. He totally understood game design and what made Civilization (as a game) tick. Some great quotes:
[When talking about preventing the player from building too many cities] "Like all penalties, there is the danger of it becoming unfun a burden to the player that might balance the game but suck the enjoyment out of it."
"In previous versions of Civ, worker options were mostly
limited to farms or mines, increasing food or production.The
tedium came from the fact that there were only two choices and
often one of them was the obvious best choice.
Therefore,we added a slew of new worker options.Workshops,
windmills, and watermills became new choices for increasing food,
production, or commerce depending on the local environment.
Cottages created an interesting option for commerce over time,
they would grow into hamlets, then villages, and finally towns, with each level producing more and more commerce.A number of new improvements were created to match the resources, such as pastures for cattle, plantations for silk, and wells for oil."
- Now we have...what...farms, TPs and mines (oh, yeah...and lumbermills)? Certainly no windmills, watermills, workshops, etc.