000 00283nam a2200109Ia 4500
001 165371
008 170722s9999 xx 000 0 und d
100 _aUsher, Abbott Payson
245 _aHistory of mechanical inventions /
260 _aBoston :
_bBeacon Press ,
_c1959.
942 _cGEN
999 _c62252
_d62252