Identifying loader/backhoe buckets.

I have a large quantity of used loader buckets that I need to identify and enter into my companies inventory. what is the best way to identify which machine a particular bucket fits if it has no fit information or part/serial numbers on it. I have a chart with pin dimensions and measurements for excavator attachments, is there something like this for loaders that I could use to match buckets with machines? Any help is appreciated!