Transactions of the International Astronomical Union C. de Jager (Cornelis de) 1921-; International Council of Scientific Unions; International Astronomical Union
Dordrecht-Holland : D. Reidel Publishing Company 1970
Proceedings of the fourteenth General Assembly, Brighton, 1970
Transactions of the International Astronomical Union General Assembly Brighton, England) 1970 C. de Jager (Cornelis de) 1921-; A Jappel; International Astronomical Union; International Council of Scientific Unions; International Astronomical Union. General Assembly (14B. : 1970 : Brighton)
Dordrecht-Holland : Reidel Publishing Company 1971