TY  - GEN
AU  - Ayres, Frank
AU  - Ault j.c.
TI  - Theory and problems of differential equations in si metric units:  
SN  - 0070990069
U1  - 515.35 
PY  - 1952///
CY  - singapore
PB  - schaum's outline series Company Ltd 
KW  - Differential Equations
KW  - Mathematice
ER  -