00271nam a2200109Ia 4500008004100000041000800041082001800049100001500067245002300082260004800105300000800153211209s1957    xx            000 0 und d  aeng  a620.1 N57 GIR  aGIRKIN H F  aAPPLIED MECHANICS   aPENNEYSULAIAbINTERNATIONAL TEXT BOOKc1957  a429