Lancaster, PA: The American Physical Society, 1953. Wraps. First Edition. 1331-1671 pp. 4to. Green paper wraps with chipping and wear to covers and spine, 2" horizontal tear at midpoint of cover from right edge. First page has a 3" piece missing from the lower right corner, does not impact major article. Otherwise clean within. Very Good.
Paper is the first to mention the "horizon" problem in cosmology.