By Richard MizeBusiness editorrmize@oklahoman.comTulsa-based McGraw Realtors has acquired 13 Anderson Properties locations in Oklahoma and Arkansas, including four in the Oklahoma City metro area. McGraw, in business since 1938, now has 18 locations with about 750 real estate agents. The company said it previously had about 410 agents working out of five offices. McGraw bought Anderson Properties' assets in Oklahoma and Arkansas, not the company.Read more on NewsOK.com