Jones, Billy M. J. A. Mull, Jr: Independant Oilman from Spivey-Grabs to Cheyenne Wells - Wichita, KS Wichita State University 1982 ISBN: 0-86546-035-3 Subjects--Personal Names: Mull Family Subjects--Topical Terms: FamiliesBusinessesOil & Gas Industry Subjects--Geographic Terms: KansasOklahoma