To John M. Short:

I first ran across “After King Kong Fell” in THE GIRL IN THE HAIRY PAW (Gottesman & Geduld, Avon, 1976) but here’s where you can also find it:

First appeared in: OMEGA, Walker, 1973 hardcover

Also appeared in: OMEGA, Fawcett, 1974 paperback

Also appeared in: BEST SF: 1974, 1975

Also appeared in: NEBULA AWARD STORIES TEN, Berkley, 1975 paperback

Also appeared in: NEBULA AWARD STORIES TEN, Corgi, 1977 British paperback

Also appeared in: THE RIVALS OF KING KONG, Corgi, 1978 British paperback

Also appeared in: THE GRAND ADVENTURE, 1984

Also appeared in: THE CLASSIC PHILIP JOSÉ FARMER 1964-1973, 1984

Also appeared in: THE MONSTER BOOK OF MONSTERS, 1988

The story was also a 1974 Nebula Award nominee.