http://www.lm.com/~lmann/awards/nebulas/nebulas.html
The Nebula Awards are presented annually by the Science Fiction Writers of America to acknowledge excellence in science fiction writing. Winners and nominees are indexed from the categories of novel, novella, novelette and short story. The index is accessible by year or by decade, from the 1960s to the 1990s. A separate list of Grand Master awards is also available, including Heinlein, Bradbury and Le Guin. This is an easily readable index for science fiction lovers.