ISBN-13: 9781409414292 / Angielski / Twarda / 2010 / 224 str.
ISBN-13: 9781409414292 / Angielski / Twarda / 2010 / 224 str.
In English translation. For further documents, see Second Series 71, 99 and 111. This is a new print-on-demand hardback edition of the volume first published in 1929.