Re: the Minn I9 notes from another topic, Where can you find info on distribution/demand of each FR District?
Try this excellent US paper money site: http://www.uspapermoney.info/ Lists in various formats by District, so you can see the big-hitters (B & L) versus the smaller ones (H/I/J).
I started that thread and a whole lot of information can be found at USPapeMoney.Info. Just look around that website and you can learn a whole lot. -tbud