Specifically they are called BLM Surface Management Status Maps. they come in 1:100,000 scale.
Buy at local BLM office or PLIC "Public lands Information Center" or a lot of local places such as surveying graphics places, sporting goods, etc. especially if you live in a western (mostublic land) state.
http://plic.org/home.php try this website and 'choose your state'on the left side of screen to get started toward selecting and purchasing, They have a great feature to search by hunting unit as defined by each state!