Spectral theory /
Lorch, Edgar Raymond.
Spectral theory / [by] Edgar Raymond Lorch. - New York : Oxford University Press, 1962. - 158 p. - University texts in the mathematical sciences .
Spectral theory (Mathematics).
Spectral theory / [by] Edgar Raymond Lorch. - New York : Oxford University Press, 1962. - 158 p. - University texts in the mathematical sciences .
Spectral theory (Mathematics).