Shown above is an editorial spread (click to see at full size) from 'The Science Fiction Book: An Illustrated History' by Franz Rottensteiner, published in 1975. The book went into great detail on almost every major theme that could be found in science fiction, including the more far out authors of the era like J. G. Ballard and Michael Moorcock.
Seen on the left is a photographic illustration to Gretchen Haapennen's 'The Pieces of the Game' in New Worlds #184. Shown on the right are illustrations by R. Glyn Jones (center) superimposed over an illustration for J. G. Ballard's 'The Killing Ground'.