TY  - BOOK
AU  - Piaggio, H.T.H.
TI  - An Elementary Treatise on Differential Equations and their applications
T2  - Bell's Mathematical series/edited by William P. Milne
U1  - B321 J8P; 2 
PY  - 1970///
CY  - Bombay
PB  - Orient Logman
ER  -