Houtgast, J. (1942). The variations in the profiles of strong Fraunhofer lines along a radius of the solar disc .. Drukkerij F. Schotanus & Jens.
Chicago-viite (17. p.)Houtgast, Jakob. The Variations in the Profiles of Strong Fraunhofer Lines Along a Radius of the Solar Disc .. Utrecht: Drukkerij F. Schotanus & Jens, 1942.
MLA-viite (8. p.)Houtgast, Jakob. The Variations in the Profiles of Strong Fraunhofer Lines Along a Radius of the Solar Disc .. Drukkerij F. Schotanus & Jens, 1942.
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