Twenty-nine works by the sculptor Johan Severtson are listed for sale in this booklet, printed while he was an MFA candidate at the University of Chicago, researching sculpture design at its Institute for Computer Research. A computer produced permutations of elements he set, such as two flat planes in a proportion of three to four, and he chose which designs to build in steel or masonite. Number 5, the steel 3:4 rV of 1966, is in this collection.