TY  - BOOK
AU  - Pennisi, Louis L.
TI  - Elements of ordinary differential equations
SN  - 0-03-078950-8
U1  - 515.3 PEE 
PY  - 1972///
CY  - New York
PB  - Holt, Rinehart and Winston, Inc.
N1  - Includes index
ER  -