Tor Double no. 11

Houston, Houston, Do You Read? by James Tiptree Jr. (pseudonym of Alice Sheldon).
It won a Nebula Award for Best Novella in 1976 and a Hugo Award for Best Novella in 1977. The novella first appeared in the anthology Aurora: Beyond Equality, edited by Vonda N. McIntyre and Susan J. Anderson, published by Fawcett in May 1976. It was subsequently reprinted several times (amongst others in the James Tiptree collections Star Songs of an Old Primate in 1978 and Her Smoke Rose Up Forever in 1990) and in 1989 was published in a Tor Doubles mass market paperback (number eleven in that series) with the flipside novella "Souls" by Joanna Russ.

Souls by Joanna Russ
"Souls" is a 1982 science fiction novella by Joanna Russ. It was first published in the Magazine of Fantasy & Science Fiction in January 1982, and subsequently republished in Terry Carr's The Best Science Fiction of the Year 12,[2] in Russ's 1984 collection Extra(ordinary) People, as well as in the first volume of the Isaac Asimov/Martin H. Greenberg-edited anthology The New Hugo Winners, and in 1989 as half of a Tor Double Novel (with "Houston, Houston, Do You Read?" by James Tiptree, Jr.).