6 IF magazines - 1973 complete: bimonthly issues February, April, June, August, October, December. Ejler Jakobsson is editor, Judy-Lynn Benjamin is managing editor, Lester del Rey is feature editor, Jack Gaughan is art director. Complete serials are Our Children's Children and Inheritance. Two stories were nominated for Hugo and/or Nebula awards (noted below.)

Worlds of IF - Science Fiction: January-FEBRUARY 1973 (Vol. 21, No.9)
All interior illustrations by Jack Gaughan. Cover by David A. Hardy.

Novella: "Death and Designation Among the Asadi" by Michael Bishop (this was nominated for both Hugo & Nebula awards.)

Novelette: "The Never Girl" by Michael G. Coney (a "Friends" story.)

Stories: "Construction Shack" by Clifford D. Simak [nominated for "Hugo" award]
"Ghosts" by Robert F. Young.

Worlds of IF - Science Fiction: March-APRIL 1973 (Vol. 21, No.10)
All interior illustrations by Jack Gaughan. Cover by Brian Boyle (for "The Wizard of Anharitte.")

Novella: "Doomship" by Frederik Pohl & Jack Williamson (part of Farthest Star.)

Novelette: "A Woman and Her Friend" by Michael G. Coney (a "Friends" story.)

Serial: "The Wizard of Anharitte" (Conclusion) by Colin Kapp.

Stories: "Next Time" by David Magil
"Call Me Proteus" by Edward Wellen.

Worlds of IF - Science Fiction: May-JUNE 1973 (Vol. 21, No.11)
All interior illustrations by Jack Gaughan. Cover by Brian Boyle Studio (for "Mnarra Mobilis.")

Serial: "Our Children's Children" (Part 1 of 2) by Clifford D. Simak.

Novelettes: "Susie's Reality" by Bob Stickgold [I highly recommend this]
"Mnara Mobilis" by Sidney J. Van Scyoc
"Promise Them Anything" by Dean McLaughlin.

Story: "Experiment" by Beverly Goldberg.

Worlds of IF - Science Fiction: July-AUGUST 1973 (Vol. 21, No.12)
All interior illustrations by Jack Gaughan. Cover by David Hardy ("Astronauts on Deimos.")

Novelettes: "Pearsall's Return" by F. M. Busby
"The Invaders" by Stephen Tall.

Serial: "Our Children's Children" (Conclusion) by Clifford D. Simak.

Story: "The Meaning of the Word" by Chelsea Quinn Yarbro
"Support Your Local Police" by David Magil
"Westwind" by Gene Wolfe.

Worlds of IF - Science Fiction: September-OCTOBER 1973 (Vol. 22, No.1)
All interior illustrations by Jack Gaughan. Cover by David Hardy ("Advanced Lunar Base")

Serial: "Inheritance" (Part 1 of 2) by Robert Wells.

Novelette: "The Hornets of Valor" by William Lee.

Stories: "Sentience" by Lee Killough
"The Learning of Eeshta" by F. M. Busby (a "Demu" story)
"Time of the Cetis" by Gene Kilczer
"The Merchant" by Larry Eisnenberg
"Space Bounce" by Stephan Tall.

Worlds of IF - Science Fiction: November-DECEMBER 1973 (Vol. 22, No.2)
All interior illustrations by Jack Gaughan. Cover by Brian Boyle Studio (for "Inheritance")

Novelette: "Price of Honor" by Kenneth Von Gunden.

Stories: "How to Blow Up an Asteroid" by Duncan Lunan (an "Interface" story)
"Dingbat" by Ron Goulart
"Man of Many Parts" by Susan Ellison
"Velvet Fields" by Anne McCaffrey.

Serial: "Inheritance" (Conclusion) by Robert Wells.