Analog Science Fiction - Science Fact May 1987 (Vol.107, No.5)
Cover by Dell Harris (for "The Report on Bilbeis IV.")

Serial: "The Report on Bilbeis IV" (Part 1 of 3) by Harry Turtledove (formed part of Noninterference.)

Novella: "Displaced Person" by Ian Stewart.

Novelette: "All Fall Down" by Don Sakers

Stories "The Grand Tour" by Charles Sheffield
"Health Food" by W. R. Thompson
"Conestoga History" by James B. Johnson
"Partly Murphy" by Henry Melton
"The Testament of Geoffrey" by J. Brian Clarke.

Stanley Schmidt's editorial is "Butterfly Futures."