00243nam a2200109Ia 4500008004100000041000800041082001900049100001200068245003600080260000900116300000800125211209s1971    xx            000 0 und d  aeng  a500 N7 RIC/WES  aRICHARD  aCONSTRUCTION OF MODERN SCIENCE   c1971  a171