Symposium.
APA Citation
International Astronomical Union. (1953). Symposium. Dordrecht, Holland [etc.]: Published on behalf of the International Astronomical Union by D. Reidel [etc.].
MLA Citation
International Astronomical Union. Symposium. Dordrecht, Holland [etc.]: Published on behalf of the International Astronomical Union by D. Reidel [etc.], 1953.
Warning: These citations may not always be complete (especially for serials).