Isaac Asimov's Science Fiction Magazine: December 1982.
Special "Foundation" Issue

Featured stories:
Viewpoint: "The Story Behind the "Foundation" by Isaac Asimov (article/essay);
"Foundation's Edge" by Isaac Asimov (excerpt from forthcoming novel, with appreciative commentary by Arthur C. Clarke, Alvin Toffler, Harlan Ellison, Harry Harrison, Clifford Simak, L. Sprague de Camp, Larry Niven, Gregory Benford, Stanley Schmidt, Poul Anderson, Martin Gardner, Spider Robinson, Frederik Pohl, Algis Budrys, A. E. Van Vogt, Jack Williamson);
"The Sorceress in Spite of Herself" by Pat Cadigan;
"Measuremen" by Jayge Carr;
"Cutting Down" by Bob Shaw
"Destroyer City" by Hope Athearn;
"Our Revels Now are Ended" by James Corrick.