Book-sized exhibition catalogues too in the West typically have a colour photograph of every item on display, and also of other relevant works not in the exhibition (these usually smaller and often in black and white). There will be a short formal catalogue description of each item, and usually interpretative text often amounting to one or more pages. The resulting book will have at least one introductory essay, often several, footnotes, bibliography and other critical apparatus. It is usually only in the language of the location, although if the exhibition is travelling internationally, local translated editions will be produced for each location. The book may be published by the institution that hosts the exhibition (or one of these institutions), but is distributed by and often co-published with a larger publisher. It will not dwell on the fact that it is the catalogue of a particular exhibition, and often will not contain a plan of the exhibition. Visitors to the exhibition will anyway know this, and the intention - often successful - is to create a book which has a permanent usefulness. Nearly all are produced in paperback; a hardback edition is a sign of serious intentions. Most major catalogues are sold in at least some bookshops, and are available for order more widely through the booktrade. Many receive specific sponsorship to finance them, and usually a number of authors contribute.