Before revision: Hardcover published July 1, 1958 by Rand McNally & Co.; Paperback published 1960 by Penguin Books Limited; Mass market paperback edition May 1961 by Pocket Books, Inc. published in English the following year.
After revision: Norwegian, Swedish, Danish, and Finnish, and inHardcover published July 1, 1958 by Rand McNally & Co.; Paperback published 1960 by Penguin Books Limited; Mass market paperback edition May 1961 by Pocket Books, Inc. published in English the following year.