Naimark, M.A.
Linear differential operators - London George G. Harrap 1968 - 2 v. (v.2-xv, 352 p.)
Linear differential operators
515.7242 / NAI
Linear differential operators - London George G. Harrap 1968 - 2 v. (v.2-xv, 352 p.)
Linear differential operators
515.7242 / NAI