Sandow, Peter Micheal, 1947- An investigation of deep levels in silicon [microform] / by Peter Micheal Sandow. - Ann Arbor, Mich. : University Microfilms International , 1978. - 2 microfiches ; 11 x 15 cm. Thesis (Ph.D.) - Pennsylvania State University, 1977. Subjects--Topical Terms: Semiconductors--Silicon.