Different elongated coin designs from 1893 Columbian Expo

dbldie55

I read there were 4 different designs. Does anyone know of a reference to these on how they may have been labeled? I am doing a collection, and I have different designs, but want to know how to denote them.

BStrauss3

Let me Google that for you... maybe start here: http://www.pennycollector.com/history.html it looks like it has a couple references listed...