Law and legislation 319 Land titles 59 Registration and transfer 59 National parks and reserves 41 Boundaries 39 Historic sites 25 Indians of North America 25 more ... Public lands 20 Wild and scenic rivers 20 Land tenure 19 Legal status, laws, etc 18 Finance 15 Appropriations and expenditures 13 Real property, Exchange of 13 Indian land transfers 12 Water resources development 12 Water reuse 12 Wildlife conservation 12 Conservation 11 Endangered species 11 Forest reserves 10 War memorials 10 National monuments 9 Wilderness areas 9 Energy development 8 Leases 8 Claims 7 Coastal zone management 7 Cultural property 7 Land use 7 less ...