00265nam a2200109Ia 4500008004100000041000800041082001200049100001400061245001800075260005400093300000800147211209s1979    xx            000 0 und d  aeng  aALL/JOH  aALLAN R F  aGROUND WATER   aNEW DELHIbPRENTICE-HALL OF INDIA PVT. LTD.c1979  a620