There are 3 versions on amazon:
the 1st one is published at 1993 Aug, by Springer, noted "1st ed. 1958. Corr. 2nd printing 1993 edition (August 20, 1993)";
the 2nd one is published 2014 April by Martino Fine books, remarked "2012 Reprint of 1942 Edition";
the 3rd one is published at 2013 by Literacy Licensing.
I doubt that there's much of a difference (apart from one being hardcover and the others paperback). Without going over all three editions page-by-page, it's hard to say. The "Corr." indicates that the 1958 edition had some corrections, presumably of errors in the 1942 edition, but I would guess these are minor typos.