This single had two incarnations. First, as a promotion, it was released on red vinyl to radio stations, with a mono mix on one side and a stereo version on the other. These copies are somewhat difficult to locate for collectors. The standard version sold in stores, however, was the black vinyl 45 rpm record with the red Columbia Records label. The B-side was a version of "Flowers Never Bend with the Rainfall," which was later released on Simon & Garfunkel's even-more-successful (and critically acclaimed) album "Parsley, Sage, Rosemary and Thyme". The single mix of the song features a more prominent lead vocal track (and different phrasing in the opening lines) by Paul Simon, and less reverb, than the more common LP version.