APA (7th ed.) Citation

(1948). Observations ionosphériques: Station de Fribourg. Impr. Alsatia.

Chicago Style (17th ed.) Citation

Observations Ionosphériques: Station De Fribourg. Fribourg, [Br.]: Impr. Alsatia, 1948.

MLA (9th ed.) Citation

Observations Ionosphériques: Station De Fribourg. Impr. Alsatia, 1948.

Warning: These citations may not always be 100% accurate.