van der Pol, Balth. and Bremmer, H. — Operational Calculus, based on the Two-sided Laplace Integral

Cambridge, Cambridge University Press, 1964 (reprint of second edition), paperbound, 8vo, xiii+415 pp., the Fourier integral; elementary operational images; the Delta or impulse function; linear differetial equations; step functions; etc.; fair/good condition (spine with wear, interior clean without annotations)