The Magazine of Fantasy and Science Fiction: May 1967 (Volume 32, Number 5)
Cover by Ronald Walotsky (for "Planetoid Idiot.") [Gahan Wilson's cartoon in this issue just slays me...]

Novelets: "Planetoid Idiot" by Phyllis Gotlieb
"Cyprian's Room" by Monica Sterpa.

Stories: "Sleeping Beauty" by Terry Carr
"Safe At Any Speed" by Larry Niven
"Fifteen Miles" by Ben Bova
"Interview With A Lemming" by James Thurber (reprint from 1942)
"Where Is Thy Sting" by Emil Petaja
"Fill In The Blank" by Ron Goulart (a "Max Kearny" tale.)

Science: "The Red Shift" by Theodore L. Thomas
"The Times of Our Lives" by Isaac Asimov.