Tickets are still on sale for Grammy Award winning Shenandoah at Northern Oklahoma College Tonkawa Thursday, Sept. 29, as part of the Carl and Carolyn Renfro Spring Lectureship Series.This tour is Shenandoah’s 35th Anniversary Tour. The event is sponsored by the Carl and Carolyn Renfro Endowed Lectureship Program and Northern Oklahoma College. The dinner will be held at the Renfro Center while the concert will be held in the Kinzer Performing Arts Center.Tickets may be purchased on a first come, first served basis for the event beginning Thursday, Aug. 25, at 9 a.m.A reserved table with seating for eight may be purchased for $400, which includes dinner in the Renfro Center and concert in the Kinzer Performing Arts Center with preferred lower section seating.Individual tickets for the concert may be purchased at a cost of $20 each. The concert begins at 7:30 p.m. The tickets are non-refundable.Tickets may be purchased by credit card by calling 580-628-6214 or in person at the NOC Development Office, Vineyard Library-Administration Building, NOC Tonkawa.