Seventh 6-monthly catalogue of data in IGY World Data Center A.
Series: IGY general report series -- no. 13; IGY general report series -- no. 13.
Published: 1961
Place of publication: Washington
Language: eng
Number of pages: 229
Notes: Cover title.

Data for the period 1 July 1957-31 December 1960.

Supersedes its interim catalogue of data, its Fifth six-monthly catalogue of data, and its Sixth 6-monthly catalogue of data (IGY general report series, nos. 7, 8, 10)

Includes bibliographies.