00250nam a2200109Ia 4500008004100000041000800041082002400049100001400073245003600087260000900123300000800132211209s1975    xx            000 0 und d  aeng  a620.112 N75 GUP/GUP  aGUPTA R P  aMATERIAL SCIENCE AND PROCESSES   c1975  a152