000 00316nam a2200145Ia 4500
020 _a0000809473089
082 _b24
_a000
100 _a"N/A"
245 0 _aINVENTIONS AND DISCOVRIES
260 _aHONG KONG
_c1987
300 _a87
944 _cR
999 _c609772
_d609772