What is bell's seasoning?Tring to make the perfect feast for 20 people! help! PLEASE!!!?

I know it has aturkey on the box and Martha Stewart uses it in her stuffing,some kinda secret ingred. I can't find it any where! SO do you know what the heck bells seasonng consist of,maybe i could make my own blend if i knew what in the world was in it! thank you thank you!