TY  - BOOK
AU  - Ayres,JrFrank, x
AU  - x
TI  - Schaum's outline of theory and problems of differential equations: x
SN  - x
U1  - 517.37/AYS 
PY  - 1952///
CY  - N.Y.
PB  - McGraw- Hill
KW  - Equations
N1  - x
ER  -