All copies of a publication
published in one or more impressions
but in one format
, from the same typeset master, bound
and issued at the same time or at several intervals. The first new version
of a first edition containing corrections and/or some new material
is called a 'revised edition.' A 'new edition,' by tradition, must have 10 percent
of new material. Subsequent revisions or editions are numbered sequentially as 'second,' 'third,' 'fourth,' and so on.