International League of Antiquarian Booksellers, the bookseller organizations of at least twenty-one nations are members of the league.

abbreviated as "wraps", wrappers are the paper covers of a pamphlet, often of a paper of heavier weight than the text paper; when you see "wrappers" you know the item is not a hard [..]

true vellum is a thin specially treated untanned "leather" from calf skin, also known as parchment (high quality parchment from calf skin is called vellum; general quality parchment is made [..]

usually refers to differences in bindings or end papers ( paper located just inside the front and rear covers, one half of which is glued to the cover) within an issue or printing. One variant may hav [..]

indicates that the item has never been bound, i.e. unbound sheets; not the same as disbound which indicates that the binding has been removed.

typed letter signed, as opposed to ALS, a handwritten letter signed by the writer (see also ADS, ALS, ANS and LS).

see "Binding".

volume has leather spine and corners which occupy approx. 3/4 of the space along top edge of board (cover). The remainder of the board is covered with marbled paper, plain paper, cloth, different leat [..]

top edge gilt.

a portion of a printing with changes such as minor alterations to the text either intentional or accidental; insertion of cancels, advertisements, or insertions; copies on different paper without inte [..]