MIke's Free Maps
Hat tip to Froth who linked to Mike's Free Maps #7 in his thought Eater blog.
https://archive.gamerplus.org/user/Froth
These maps are copyright Michael C. Le Bossiere, used with permission.
You can use these maps in your publications by including an attribution line like the one above. You can crop them or change them if you want.
Michael's map books are a great resource. They come in a pdf and also as jpgs both with and without grids.