N° 158 - janvier-février 1972
Couverture de Jack Gaughan

Patterns of Chaos [Part 1 of 3] • Colin Kapp • n.
The Cast-Iron Rat • Harry Harrison • na
Time Patrol • Joe L. Hensley • ss
Sheltering Dream • Doris Piserchia • nv
The Castoffs • Douglas R. Mason • ss

A partir de ce numéro le nom du magazine devient Worlds of If
N° 159 - mars-avril 1972
Couverture de Jack Gaughan

The Gods Themselves [Part 2 of 3] • Isaac Asimov • n.
The Stainless Steel Rat's Return [*Slippery Jim (James Bolivar) diGriz] • Harry Harrison • nv
One and One Are Two • David Magil • ss
Two Suns for the King • David R. Bunch • ss
Patterns of Chaos [Part 2 of 3] • Colin Kapp • n.
The Old Switcheroo • Robert Bloch • ss

N° 160 - mai-juin 1972
Couverture de Jack Gaughan

In the Ocean of Night • Greg Benford • na
The Dwarfs of Zwergwelt • Joseph Green • nv
The War Machine • David Magil • ss
Caravan • Lee Killough • nv
Silver to Bronze - Over • J. W. Schutz • nv
Patterns of Chaos [Part 3 of 3] • Colin Kapp • n.

N° 161 - juillet-août 1972
Couverture de Jack Gaughan

The Book of Rack the Healer [Part 1 of 2] • Zach Hughes • n.
Last Train from Earth • Doris Piserchia • ss
The Merchants of Venus • Frederik Pohl • na
Comet, Cairn and Capsule • Duncan Lunan • ss
Hard Sell [*Fisk Centers] • Piers Anthony • ss
The Men At Kappa • William M. Lee • ss

N° 162 - septembre-octobre 1972
Couverture de Brian Boyle

Gods on Olympus [*Stardust] • Stephen Tall • na
The Emoman • Alan Dean Foster • ss
Black Baby [*Fisk Centers] • Piers Anthony • nv
Freezeout • Donald Franson • ss
Underbelly • Gordon Eklund • ss
The Book of Rack the Healer [Part 2 of 2] • Zach Hughes • n.

N° 163 - novembre-décembre 1972
Couverture de Brian Boyle

The Wizard of Anharitte [Part 1 of 3] • Colin Kapp • n.
Whom the Gods Love • Robert F. Young • ss
Nine • David Magil • ss
Teratohippus • Robert L. Davis • nv
Shausta • David Lewis • ss
Hurdle [*Fisk Centers] • Piers Anthony • nv
The Executive Rat • Larry Eisenberg • ss
Empty Eden • Doris Piserchia • ss

N° 164 - janvier-février 1973
Couverture de David A. Hardy

Death and Designation Among the Asadi • Michael Bishop • na
Construction Shack • Clifford D. Simak • ss
The Never Girl [*Boxes] • Michael G. Coney • nv
The Wizard of Anharitte [Part 2 of 3] • Colin Kapp • n.
Ghosts • Robert F. Young • ss

N° 165 - mars-avril 1973
Couverture de Brian Boyle

Doomship [*Cuckoo] • Frederik Pohl & Jack Williamson • na
A Woman and Her Friend [*Boxes] • Michael G. Coney • nv
Next Time • David Magil • ss
Call Me Proteus • Edward Wellen • ss
The Wizard of Anharitte [Part 3 of 3] • Colin Kapp • n.

N° 166 - mai-juin 1973
Couverture de Brian Boyle Studio

Our Children's Children [Part 1 of 2] • Clifford D. Simak • n.
Susie's Reality • Bob Stickgold • nv
Mnarra Mobilis • Sydney J. Van Scyoc • nv
Promise Them Anything • Dean McLaughlin • nv
Experiment • Beverly Goldberg • ss

N° 167 - juillet-august 1973
Couverture de David A. Hardy

Pearsall's Return [*Jay Pearsall] • F. M. Busby •
The Invaders [*Stardust] • Stephen Tall • nv
The Meaning of the Word • Chelsea Quinn Yarbro
Support Your Local Police • David Magil • ss
Westwind • Gene Wolfe • ss
Our Children's Children [Part 2 of 2] • Clifford D. Simak • n.

N° 168 - septembre-octobre 1973
Couverture de David A. Hardy

Inheritance [Part 1 of 2] • Robert Wells • n.
The Hornets of Valora • William M. Lee • nv
Sentience • Lee Killough • ss
The Learning of Eeshta [*Barton (Demu)] • F. M. Busby • ss
Time of the Cetis • Gene Kilczer • ss
The Merchant • Larry Eisenberg • ss
Space Bounce • Stephen Tall • ss

N° 169 - novembre-décembre 1973
Couverture de Brian Boyle Studio

Price of Honor • Kenneth Von Gunden • nv
How to Blow Up an Asteroid [*McKay (Interface)] • Duncan Lunan • nv
Dingbat • Ron Goulart • ss
Man of Many Parts • Susan Ellison • ss
Velvet Fields • Anne McCaffrey • ss
Inheritance [Part 2 of 2] • Robert Wells • n.