Prehoda, Robert W. Your next fifty years / [electronic resource] / by Robert W. Prehoda ; foreword by J.E. Pournelle.. — New York, N.Y. : : Ace Books,, c1980.. — 348 p. : : ill. ; 21 cm. — (Ace science fiction). Includes bibliographical references and index. ISBN: 0441952208 : $5.95 9780441952205 0441952216 9780441952212 LCCN: 80110063 Subjects--Topical Terms: Twentieth century--Forecasts.Twenty-first century--Forecasts. LC Class. No.: CB161 / .P73 Dewey Class. No.: 303.4