00251nam a2200097Ia 4500008004100000082002100041100001800062245002100080260004100101300001100142240817s9999    xx            000 0 und d  a624.1821 V478, a  aVazitaue,V. N 0aStreel structurs  c1990a New Delhib Khanna Publishers  a948 p.