TY  - BOOK
AU  - Buck,R.Creighton
AU  - Buck,Ellen F.
TI  - Introduction to differential equations
SN  - 0395206545
U1  - 515.35 
PY  - 1976///
CY  - Boston
PB  - Houghton Mifflin
KW  - Differential equations
N1  - Includes bibliography: p. 34-35 (3d group) and Index
ER  -