Forsyth, A.R.
Treatise on differential equations - 6th ed. - London Macmillan 1961 - xviii, 583p.
Differential equations
517.38 / FOR/1961
Treatise on differential equations - 6th ed. - London Macmillan 1961 - xviii, 583p.
Differential equations
517.38 / FOR/1961