TY  - BOOK
AU  - Zill,Dennis C., x
AU  - x
TI  - A first course in differential equations with applications: x
SN  - x
U1  - 515.35/Z69f 
PY  - 1981///
CY  - Boston
PB  - Weber & Schmidt
KW  - Calculus
N1  - Includes
ER  -