Standard stuff about copyrights, I should think. My stuff is mine and this site’s. You’d like any of it, we talk. If all you want is to print yourself a T-Shirt, probably you can have it for free -I’ll send you a JPG, even. If you want to print many and make some money out of it, then I’ll have my fee, thank you very much. Other people’s stuff will be acknowledged, as required.