APA (7th ed.) Citation

Köhnlein, W. (1988). A model of the ionosphere in the altitude interval 50-4000 km. DFVLR.

Chicago Style (17th ed.) Citation

Köhnlein, Walter. A Model of the Ionosphere in the Altitude Interval 50-4000 Km. Koln: DFVLR, 1988.

MLA (8th ed.) Citation

Köhnlein, Walter. A Model of the Ionosphere in the Altitude Interval 50-4000 Km. DFVLR, 1988.