Cipher code for astronomical telegram
Subtitle: accepted by the International Astronomical Union to be used from 1935 November 1.
Contributors: International Astronomical Union; International Astronomical Union. Central Bureau for Astronomical Telegrams
Publisher: [s.n.]
Published: 1939
Place of publication: S. l
Language: eng
Subjects: Cipher and telegraph codes; Astronomy
Other titles: Bureau central international des télégrammes astronomiques :
Notes: Title from cover.

Signed at end: Elis Strömgren.

"June 1939"--P. 6.