TY  - BOOK
AU  - PIAGGIO (H T H)
TI  - Elementary treatise on differential equations
U1  - 513/117 
PY  - 1928///
CY  - London
PB  - G Bell & Sons Ltd.
KW  - treatise
KW  - on
KW  - equations
KW  - Elementary
KW  - differential
ER  -