00341nam a2200145Ia 4500008004100000041000800041082001900049100002200068245002200090250001200112260003300124300000800157365000800165700002200173230718s9999    xx            000 0 und d  aeng  a621.319'2bVAL  aValkenburg V.M.E.  aNetwork Analysis   a3rd ed.  c1994bPrentice Hall Of India  a571  cRs.  aValkenburg V.M.E.