00831cam a22002771 4500 7456871 BD-DhUL 20150119111428.0 751111s1955 enka b 001 0 eng 55012739 GB55-11596 (OCoLC)1826343 DLC BD-DhUL GAT Uk DLC premarc QC244 .C7 620.28 GRU Crawford, Alan E. Ultrasonic engineering : with particular reference to high power applications / by Alan E. Crawford. London : Butterworths Scientific Publications, c1955. 344 p. : ill. ; 22 cm. USD 1969-6-23 Bibliography: p. 337. Ultrasonics. 7 cbc oclcrpl u ncip 19 y-gencatlg ddc BK 33127 33127 0 0 ddc 0 620_280000000000000 0 NFIC 62039 DUSL DUSL GEN 1969-06-23 Purchased 620.28 A59608 2015-01-19 2015-01-19 BK