The Science Fiction Hall of Fame, Volume Two
The Science Fiction Hall of Fame, Volume Two is an English-language, science-fiction, two-volume anthology edited by Ben Bova and published in the U.S. by Doubleday in 1973, distinguished as volumes "Two A" and "Two B". In the U.K., they were published by Gollancz as Volume Two (1973) and Volume Three (1974).
Source: Wikipedia — The Science Fiction Hall of Fame, Volume Two (CC BY-SA 4.0)