TRC4 Rules Disclaimer: The following rules were created by a TRC4 fan. They include the rules of the published game but the artwork, layout, and formatting is all original while the text includes corrections applied by the developer. (That would be yours truly.) They are in PDF format, if you want the content in Word format, please contact me directly, I am the original author of the TRC4 edition of the game. Note that the historical weather chart presented is that used in the original Avalon Hill version of the game.
Here is a PDF of the fan-created ruleset: TRC Rules
Here is the TRC4 version of the weather chart: