7 1 50 fundamentals and frontiers Robert Jastrow Additional Author Malcolm H. Thompson Additional Author mixed material John Wiley & Sons 1977 Morton S. Roberts Additional Author mixed material AAAS Pub 1985 William K Hartman Additional Author mixed material Wadsworth 1987 Louis Berman Additional Author J C Evans Additional Author mixed material Little Brown 1983 Michael A Seeds Additional Author mixed material Wadsworth 1985 Michael Zeilik Additional Author Elske VP. Smits Additional Author mixed material Sounder College 1987 Fred Hoyle Additional Author Jayant Narliker Additional Author mixed material W.H. Fressman 1980