Royalty Interest 3 : An interest in an oil and gas property entitling the true owner to a share of oil and gas production free of costs of exploration,-development and production
EESiFlo North America, Terminology and Glossary: Oil Well Terms, Pennsylvania, Oil: Oil Well Drilling Science and Technology, USA 2002, flowmeterdirectory.com/flowmeter_terminology, (Oil Well Drilling Sci and Tech - Amer) {555}