The Council on Books in Wartime began by giving all ASE titles a successive number and dividing them into monthly lists, from debut list A (fall 1943) through final list TT (fall 1947). At first, both the number and the list-letter were printed on the cover of each ASE, for example C-7, or J-277. Successive numbering was dropped beginning with the K list; thereafter, the numbers began over again with each list, for example P-30 or T-33. Beginning with the U list, the list letter was dropped from the cover (though still used internally by the Council), and only a successive number (beginning with no. 655) appeared on the book itself, for example 926 or 1013.