TY  - BOOK
AU  - Kelley Walter
AU  -  Peterson Allan
TI  - Theory of differential equations: Classical and qualitative
SN  - 0131020269 (hbd)
U1  - B33, P4   TB 
PY  - 2004///
CY  - New Jersey 
PB  - Pearson Education, Inc.
KW  -  Differential equations
KW  - Mathematics
N1  - Bibliography 405-407p
ER  -