Lewis Carroll's 'Symbolic logic' ... : Part I, elementary, 1896, fifth edition ; Part II, advanced, never previously published ; together with letters from Lewis Carroll to eminent nineteenth-century logicians and to his 'logical sister', and eight versions of the 'Barber-shop paradox' / edited, with annotations and an introduction, by William Warren Bartley III. - Carroll, Lewis, 1832-1898 (Harvester Press, 1977)