00556nam a22001691a 4500 1/14803 990701s1947 enk 1 eng d 15293 DLC GR-PeUP 621.381 PR Pratt, W. T. Worked exaples in electrotechnology / by W. T. Pratt London : Hutchinson's Scientific and technical publications , 1947 262 p. ; 21 cm. Includes index Electronics Technology. INST UNIPILB MAIN 20040709 621.381 PR 00130854 00130854 LOAN 0 1