2012 Reprint of 1945 Edition. Exact facsimile of the original edition, not reproduced with Optica...

2013 Reprint of 1943 Edition. Exact facsimile of the original edition, not reproduced with Optica...

2014 Reprint of 1938 Edition. Full facsimile of the original edition, not reproduced with Optical...

2013 Reprint of 1956 Edition. Exact facsimile of the original edition, not reproduced with Optica...

2012 Reprint of Original 1946 Edition. Exact facsimile of the original edition, not reproduced wi...

2012 Reprint of 1956 American Edition. Exact facsimile of the original edition, not reproduced wi...

2013 Reprint of 1947 Edition. Exact facsimile of the original edition, not reproduced with Optica...