TY  - BOOK
AU  - Houtgast, Jakob
TI  - The variation in the profiles of strong fraunhofer lines along a radius of the solar disc
PY  - 1942///
CY  - Utrecht
PB  - Drukkerij Fa Schotancs & Jens
KW  - Fraunhofer lines
KW  - Solar Disc
ER  -