00238nam a2200109Ia 4500008004100000041000800041082002600049100001000075245002600085260000900111300000800120211209s1978    xx            000 0 und d  aeng  a550.246 2 N78 BLY/FRA  aBLYTH  aGEOLOGY FOR ENGINERS   c1978  a556