patch repair of inlaid wood floors?

our inlaid floors have a few places where the wood need repairing. In our hall, for example, there is a strip where an inch of wood (or so) is missing – broken or worn away. I would like to fix it myself if possible. Where might I find more info on how to do this? It looks like other spots have been repaired over the years with wood patches.
Thanks

By myplace |