TY  - GEN
AU  - Kelley Walter G
AU  - Peterson Allan C
TI  - The theory of differential equations: classical and qualitative 
SN  - 0131020269
AV  - QA431 
U1  - 515/.35 
PY  - 2004///
CY  - Upper Saddle River, N.J.
PB  - Prentice Education
KW  - Differential equations
N1  - Includes bibliographical references (p. 405-407) and index
ER  -