Paperback
details (USA).(see also: eBook (Kindle) · eBook (Kindle))
details (United Kingdom).(see also: eBook (Kindle) · eBook (Kindle))
details (Germany).(see also: Kindle Ausgabe · Kindle Ausgabe)
details (Canada).(see also: eBook (Kindle) · eBook (Kindle))
ISBN: 978-0-486-20291-4
ISBN-10: 0-486-20291-7
Dover Publications · 1960