International Standard Book Number in 1965, has – 340 indicating the publisher, 01381 their serial number, and 8 being the check digit. This can be converted to ; the check digit does not need to be re-calculated. Since 1 January 2007, ISBNs have contained 13 digits, a format that is compatible with "Bookland" European Article Number EAN-13s. An ISBN is assigned to each edition and variation (except reprintings) of a book. For example, an ebook, a paperback, and a hardcover edition of the same book would each have a different ISBN. The ISBN is 13 digits long if assigned on or after 1 January
Number 13 (film) him about life in the early twenties, and his first films. On one occasion, he said that it was a "somewhat chastening experience". As with Hitchcock's later lost film "The Mountain Eagle", footage from "Number 13" has become widely sought after by film historians and collectors without success. "Number 13" was written by Anita Ross, a woman employed at the Islington studio. She claimed to have a professional association with Charlie Chaplin, according to Hitchcock, in his book-length interview with François Truffaut, "Hitchcock/Truffaut" (Simon and Schuster, 1967). Clare Greet was obliged to finance the production with her own money; before