Basic physics of ultrasonic imaging by Nimrod M. Tole English | 1 Jan. 2005 | ISBN: 9241592990 | 100 Pages | PDF | 6 MB Medical Technology and Radiation Medicine.
Marie D. George and Timothy G. Donley, "Ultrasonic Periodontal Debridement: Theory and Technique" English | 2014 | ISBN: 1118295455 | 232 pages | PDF | 7 MB