Norstrilia

US paperback original is the true first of the complete novel as Smith wrote it, confirming the census claim. The novel had earlier been split by his publisher into two shorter volumes, each a Pyramid Books paperback original and each collected in its own right: The Planet Buyer (Pyramid Books, New York, 1964, R-1084, cover by John Schoenherr) and The Underpeople (Pyramid Books, New York, November 1968, X-1910, cover by Jack Gaughan). Those are separate abridged/split texts, not earlier editions of Norstrilia. The NESFA Press hardcover (Framingham, MA, 1994) is the first hardcover but a "first thus": it adds further revisions and corrections plus an appendix of variant texts, and that 1994 text — not the 1975 text — is what the 2008 Baen omnibus We, the Underpeople reprints.