Circular. 467. Atomic energy levels as derived from analyses of optical spectra: v. 2 Spectra of chromium, manganese, iron, cobalt, nickel, copper, zinc, gallium, germanium, arsenic, seienium, bromine, krypton, rubidium, strontium yttrium zirconium, and niobium [with lists of references]; by Charlotte E. Moore.

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