000 00260nam a2200097Ia 4500
999 _c5412
_d5412
100 _aHarry Walton
245 _aHow and why of Mechanical movements
260 _c1968
_bPOPULAR SCIENCE PUBLISHING CO. E.P.DUTTON & CO. INC
_aNew York
300 _a297
942 _cREF