00309nam a2200109Ia 4500008004100000041000800041082002000049100001600069245007300085260003300158300000800191211209s1965    xx            000 0 und d  aeng  a515.983 N65 GRE  aGREENSPAN D  aINTRODUCTORY NUMERICAL ANALYSIS OF ELLIPTIC BOUNDARY VALUE PROBLEMS   bA HARPER INTERNATIONALc1965  a176