000 002690000a22001210004500
080 _a51:621.7
_bS6
100 _aSlade, Samuel
245 _aEssentials of shop mathematics
260 _aNew York
_bWiley
_c1941
300 _a194p.
700 _aMargolis, L.
942 _cBK
999 _c53111
_d53111