TY  - BOOK
AU  - Norkin, S. B.
TI  - Differential equations of the second order with retarded argument some problems of the theory of vibrations of systems with retardation
SN  - 0821815814
U1  - 515.35 
PY  - 1972///
CY  - Providence
PB  - American Mathematical Society
KW  - Differential equations
KW  - Vibration
ER  -