The physics of phonons / G.P. Srivastava. Srivastava, G. P. Phonons. Crystals. Liquid helium. QC176.8.P5 S67 1990 530.4.16 20 SRP Includes bibliographical references (p. 391-409) and index. Bristol ; Philadelphia : A. Hilger, c1990. c1990. 1990 Text xiii, 421 p. : http://www.loc.gov/catdir/enhancements/fy0668/90031835-d.html eng