00257nam a2200109Ia 4500008004100000020001800041041000800059100002500067245002700092260002100119300000700140230724s1989    xx                  und d  a9780000000000  aeng  aSCHILLING ALEXANDER.  aBASICS MODEL BUILDING.  bBIRKHAUSERc1989  a79