Generally numbers (or letters) on a copyright page refer to an edition number so "12" would either mean a 12th edition or if they are 1,2 in sequence then a third edition.
If a book only has the number 1 on the copyright page, it likely indicates that it is the first printing of that particular edition of the book. This number is often used by publishers to denote the initial print run of a book.
A set of letters or numbers on the copyright page generally refers to the number of the printing or edition of the book.
The copyright usually is located at the back of the first page or the front cover of the book.
The copyright page of a book is typically on the reverse of the title page.
The edition number can be found on the page with the copyright information. This is usually one or two pages inside the book. It is almost always the first page with writing/information on it. The edition number should be printed underneath the copyright statement.
The copyright page of a book is typically on the reverse of the title page, and includes copyright notifications and cataloging data for the national library of the country in which it was published.
The copyright page is generally on the reverse of the title page rather than on the back of the book. It includes copyright and printing information.
The reverse of the title page should have all of the copyright information.
The copyright and catalog-in-publication data should be on the reverse of the title page.
all of above.
Usually the page in small print before the title page.
The copyright page indicates the rightsholder, publication information, and cataloging information from the national library of the country of publication.