5th International Planetarium Directors Conference 1975
Subtitle: Prague, Czechoslovakia, Chorzów, Poland
By: [compiled] by Marcel Grün.
Contributors: Grün, Marcel.
Publisher: Planetarium
Published: 1975
Place of publication: Prague
Language: eng
Number of pages: 78
Subjects: Planetariums -- Congresses.
Other titles: Fifth International Planetarium Directors Conference, 1975.