000 00264nam a2200097Ia 4500
008 231207s9999 xx 000 0 und d
082 _a54
_b1999
100 _aMuhammad Usman Waziri
245 0 _aPunjab School of mines, Katas, District Chakwal [Thesis]
260 _bNCA
999 _c36018
_d36018