TY  - BOOK
AU  - Kells, Lyman M.
TI  - Elementary differential equations
U1  - Circ. 515.35 K294 1965 6th ed.
PY  - 1965///
CY  - Japan : 
PB  - Mc-Grow-hill Kogakusha, ltd., 
N1  - Include index
ER  -