Need Landman in Logan Couty Okalhoma

Need a landman to do some discovery work in Logan County Oklahoma for the amount of acreage that was owned by my Stepfather in about 10 to 12 parcels. After recoving some lost royalities from the State of Okla. a local oil company gave me a list of legals that we might own minerals in form inheritance. These are very small areas but would like to have the percents we own to have record of and i am disbled and unable to do the discovery work at the courthouse.