00271nam a22001217a 4500008004100000041000800041080000800049100000700057101000800064245004800072942001200120999001700132181218b        xxu||||| |||| 00| 0 eng d  aeng  a510  a37  aMAY  aPlane  And  Spherical  Trigometry cNoble.B  2udccBK  c53338d53338