TY - BOOK AU - Harwit,Martin TI - Astrophysical concepts SN - 0387966838 AV - QB461 .H37 1988 U1 - 523.01 19 PY - 1988/// CY - New York PB - Springer-Verlag KW - Astrophysics N1 - Includes index; Bibliography: p. [596]-612 ER -