LSJ
τό, Dim. of τόμος II, small volume, tract, Eust. ad D.P. Prooem. p. 74 B., EM 790.8, etc. ; the τομάρια of Aristonymus are freq. cited by Stob., as 2.31.85, 4.46.21.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
τό, dim. von τόμος, ein kleiner Band, EM.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)