TY  - BOOK
AU  - Gregory,John,b.1938
TI  - Quadratic form theory and differential equations
SN  - 0123014506
PY  - 1980///
CY  - New York
PB  - Academic Press
KW  - Forms, Quadratic
KW  - Differential equations, Partial
KW  - Calculus of variations
N1  - Includes index; Bibliography: p.231-233
ER  -