BARNES & NOBLE, PW, Jan. 23, 1961, at 238 (announcing that B&N will be promoting its new paperback lines, including U Books, named after the English publisher Unwin, which will publish the books simultaneously in England, with full-page ads in the NY Times, New York Herald Tribune, Chicago Tribune, and the NY Times Book Review).
Ad, PW, Apr. 10, 1961, at 6