00250nam a2200109Ia 4500008004100000041000800041082001600049100001700065245003100082260001900113300000800132211209s1990    xx            000 0 und d  aeng  a721 N90 MAR  aMARK, ROBERT  aLIGHT, WIND AND STRUCTURE   aUSAbMITc1990  a206