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

Best Science Fiction Stories of the year (Del Rey/Dozois) is a 2-book series with 2 primary works first released in 1978 with contributions by Steven Utley, Howard Waldrop, Michael Bishop, Spider Robinson, Jeanne Robinson, John Varley, Edward Bryant, George R.R. Martin, and Raccoona Sheldon.