TY  - BOOK
AU  - Fry,Thornton C.
TI  - Elementary differential equations
U1  - 517.38 
PY  - 1929///
CY  - London
PB  - Macmillan and Company Limited
KW  - Differential equations
KW  - The origin of differential equations
N1  - "This text, which has evolved through several mimeographed editions in the Out-of-hour courses of Bell Telephone Laboratories, is intended primarily for students of engineering and its allied sciences."--Pref
ER  -