Galaxy Magazine, May-June 1973 (Vol. 33, No. 6)

May-June 1973, Vol. 33, No. 6. Cover by Jack Gaughan for "Parthen" by R. A. Lafferty. ALSO: The Doomsday Gene (serial , part 1 of 2) by John Boyd; On the Account [John Grimes Rimworld] by A. Bertram Chandler; In This Dark Sky by Frances Chapman; Girl Saturday by Robert F. Young; Future Forbidden by R. S. Richardson [as by Philip Latham]. FEATURE: Galaxy Bookshelf by Theodore Sturgeon.