Getting permission to fish private ponds

There is a lot of ponds (stock tanks) that I fished as a kid that I would like to start fishing again? Problem is I no longer know who owns the majority of them and was wondering, what is the best way to find and get in contact with the landowner? I have two young daughters that I would like to get interested in fishing and thought ponds would be the best way to start. Any ideas or help would be appreciated. Thanks

Tax office is a source of information. Take it from there.