Choquard, Philippe. The anharmonic crystal. - New York W. A. Benjamin 1967. - xii, 340 p. illus. 24 cm. - Frontiers in physics . Bibliography: p. 334-335. LCCN: 67031222 Subjects--Topical Terms: Crystallography, Mathematical. LC Class. No.: QD911 / .C47 Dewey Class. No.: 548/.7