1. D. Goldman and T. F. Hueter, Tabular Data of the Velocity and Absorption of High-Frequency Sound in Mammalian Tissues, J. Acoust. Soc. Am. 28, 35 (1956)
2. For an interesting analysis of various detecting modes using square-law detection, see K. Wang and G. Wade, Threshold Contrast for Various Acoustic Imaging Systems, this volume, page 431
3. Acoustical Holography;A Sokollu,1971
4. G. D. Ludwig, The Velocity of Sound Through Tissues and the Acoustic Impedance of Tissues, J. Acoust. Soc. Am., 862 (1950)
5. E. L. O’Neil, Introduction to Statistical Optics, Addison-Wesley (Reading), Chap. 2 (1963)