Asimov, Wollheim and Dozois...and Their SF Year-by-Year Anthology Series

Isaac Asimov and Donald A. Wollheim, both significant science fiction writers of their era in the mid-to-late twentieth century, passed away in their seventies just two years apart: Asimov in 1992 and Wollheim in 1990.  In their later years they were both important anthologists with Wollheim's Annual World's Best SF Series covering the period from 1964 through 1989.  Asimov, during the 1980s, decided to go back and anthologized his own (and co-editor Martin Greenberg's) favorites in a year-to-year retrospective series titled The Great SF Stories...this covered the years 1939-63.  Asimov, a longtime friend of Wollheim, had his series published by the latter's company, DAW Books.  Over the years and especially recently, I have appreciated and enjoyed the efforts of these two writers who obviously loved their chosen genre of fiction to undertake this sort of effort involving sorting through the many quality stories that their colleagues (and, sometimes, they themselves) produced.  It's a shame that, in this digital age, I can't get either anthology series on Kindle or audiobook...if they were recording artists there wouldn't be a problem with their old works.  Starting next Wednesday, I will be reviewing Wollheim's final anthology, published in 1990 while he was already very ill and covering that last year of 1989.  After that I plan to continue reviewing science fiction short stories from another excellent anthology, that of the late Gardner Dozois and titled The Year's Best Science Fiction (which is available on Kindle and audiobook)..his will continue through the year 2018 so I'm not very likely to run out of material anytime soon, especially since his collections are much lengthier than those of Asimov or Wollheim...I'm very grateful for all three of these important figures of science fiction...