TY  - GEN
AU  - Markley,Nelson G.
TI  - Principles of differential equations
T2  - Pure and applied mathematics: a wiley series of texts, monographs and tracts
SN  - 0471649562
U1  - 515.35 
PY  - 2004///
CY  - [S.l.]
PB  - Wiley-Interscience
ER  -