Samuel R. Delany - The Einstein Intersection - Ace 1967

Samuel R. Delany - The Einstein Intersection - Ace Books 1973

Samuel R Delany - The Einstein intersection Ace edition 1967

Samuel R Delany The Einstein Intersection. Sphere Science Fiction 1973

The Einstein Intersection Samuel R. Delany PB 1st Ace (1973)

Babel-17 Samuel R. Delany 1973 Third Printing Nebula Award Sci-Fi Ace Books PB