Worlds of IF - Science Fiction: October 1968
Illustrations by Jack Gaughan, Virgil Finlay, Dan Adkins, Roger Brand. Cover by Doug Chaffee (for "High Weir.")

Novelettes: "High Weir" by Samuel R. Delany
"Deathchild" by Sterling Lanier
"Or Battle's Sound" by Harry Harrison
"Pupa Knows Best" by James Tiptree, Jr..

Novel: "The Proxy Intellingence" by A. E. Van Vogt (labelled a "complete novel condensation" - this appeared unchanged as the title story of a collection, and was also incorporated into the fix-up Supermind.)

Story: "Paddlewheel on the Styx" by Lohr Miller.

Feature: "Report on Japanese Science Fiction" by Takumi Shibano.

Edited by Frederik Pohl, Lester del Rey is managing editor, Judy-Lynn Benjamin is associate editor.