TY  - BOOK
AU  - Choquard,Philippe
TI  - The anharmonic crystal
U1  - 548.7 
PY  - 1967///
CY  - New York
PB  - W. A. Benjamin
KW  - Crystallography, Mathematical
KW  - Perturbation (Mathematics)
KW  - Quantum theory
N1  - Includes index; Bibliography: p. 334-335
ER  -