Thank you, Denny. That recipe index is a nice reference.
I think I figger'd out my original question. Correct me if I'm wrong.
On a package of any given hop, (hops??) there should be an AAU number. So if a recipe calls for 8 AAU and the hop package states an AAU content of 6, you'd want to go with 1-1/3 oz of that particular hop. (1 oz gives you 6 AAU and 1/3 of 6 is 2, so add it to 6 to get the neede 8 AAU) So the AAU is stated on a recipe to adjust for seasonal variations in AAU.
Am I gettin' this or what?