København, Ejnar Munksgaard, 1951.
8vo. 2 volumes both in the original wrappers. Offprints from "Det Kongelige Danske Videnskabernes Selskab", bind 26, no. 5 & bind 26, nr. 12. Both fine and clean. 28 pp.; 19 pp.
Offprint of Lassen's two important papers in which he established experimentally that equilibrium charge states of swift heavy ions are higher in solids than in gases.
Order-nr.: 51306