Krogdahl, M. K. (1944). Physical problems related to the hydrogen and helium lines in stellar spectra ... [publisher not identified].
Chicago Style (17th ed.) CitationKrogdahl, Margaret Kiess. Physical Problems Related to the Hydrogen and Helium Lines in Stellar Spectra ... [Place of publication not identified]: [publisher not identified], 1944.
MLA (8th ed.) CitationKrogdahl, Margaret Kiess. Physical Problems Related to the Hydrogen and Helium Lines in Stellar Spectra ... [publisher not identified], 1944.
Warning: These citations may not always be 100% accurate.