5 1 10 LUCE, HENRY R. Primary Author mixed material NEW YORK, NEW YORK TIME-LIFE BOOKS 1967, 1973 LAPP, RALPH E. Primary Author mixed material NEW YORK, NEW YORK TIME-LIFE BOOKS 1963, 1974 LEONARD, JONATHAN NORTON Additional Author SAGAN, CARL Primary Author mixed material NEW YORK, NEW YORK TIME-LIFE BOOKS 1967, 1975 CLARKE, ARTHUR C. Primary Author mixed material NEW YORK, NEW YORK TIME-LIFE BOOKS 1974 BARNETT, LINCOLN Primary Author WATSON, JANE WERNER Additional Author mixed material NEW YORK, NEW YORK TIME-LIFE BOOKS 1956