My mother has mineral rights in ND. On one of her oil and gas leases it states the township, range, and section "containing 160 acres, more or less". Now, I know my mothers sister has a lease stating the exact same land. Is there any way to find out if there are more people with rights on this exact same land? My mothers sister is not mentioned in Mom's lease so I assumed there could be other people with rights to the same land area, is that the case?