00284nas a2200133   4500000000100000000000100001008004100002260001900043100001500062700001800077245001900095300001400114020002200128       1993                            d  bBeckaMünchen1 aJohn North1 aWalter Rüegg00aDas quadrivium  a303–320  a978-3-406-36956-1