000 00317nam a2200121Ia 4500
008 240112s9999 xx 000 0 und d
082 _a608
_bR
100 _aDhanesh Kumar
245 0 _aBook of inventions, discoveries firsts
260 _a New Delhi
_bBook Palace
_c1991
650 _aInventions & patents
942 _cREF
999 _c5580
_d5580