00281nam a2200097Ia 4500008004100000082001900041100001700060245004000077260005600117300001000173210430s9999    xx            000 0 und d  a620.11 A2411 A  aAnwar ul Haq  aAdvanced Materials-93cAnwar ul Haq  aRawalpindibDr A.Q.Khan Research Laboratoriesc1994  a792p.