00234nam a2200097Ia 4500008004100000041000800041100002900049245002100078260002900099300000800128230828s1990    xx            000 0 und d  aeng  aKHURMI R.S.\, SEDHA R.S.  aMATERIAL SCIENCE  bS. CHAND & COMPANYc1989  a486