Best Science Fiction Stories of the year (Del Rey/Dozois)

Best Science Fiction Stories of the year (Del Rey/Dozois) is a 6-book series with 6 released primary works first released in 1972 with contributions by Lester del Rey, Steven Utley, Howard Waldrop, Michael Bishop, Spider Robinson, Jeanne Robinson, John Varley, Edward Bryant, George R.R. Martin, and Raccoona Sheldon.