TY  - BOOK
AU  - Piaggio, H.T. H.
TI  - An elementary treatise on differential equations and their applications
SN  - 0713508515
U1  - 515.33 PIA 
PY  - 1971///
CY  - London
PB  - C. Bell and Sons, Ltd.
KW  - ME
KW  - Differential Equations
ER  -