000 00257nam a2200109Ia 4500
999 _c7831
_d7831
100 _aHoughton P S
245 _aGears Spur Helical Bevel Internal Epicyclic and Worm
250 _a3
260 _c1970
_bTECHNICAL PRESS
_aLondon
300 _a26.17
942 _cBK