Thank you for noting that the Carpenters concert was at SWOSU rather than Northwestern. I was 22 at that time living in Weatherford and working in Clinton. A friend of mine and I had tickets to the concert and were able to attend. We managed to meet and speak with both Karen and Richard after the concert. Both were very friendly and gracious. I did manage to get them to autograph my tickets both of which I still have. It was unforgettable time for music.