000 00311nam a2200121Ia 4500
008 220201s1968 xx 000 0 eng d
041 _aENG
100 _aHELSDON, R M
245 0 _aMECHANICAL ENGINEERING SCIENCE
260 _aLONDON
_bTHAMES AND HUDSON PUBLISHING COMPANY
_c1968
300 _a182
942 _2ddc
999 _c40920
_d40920