Confrontation of cosmological theories with observational data : symposium no. 63 (Copernicus Symposium II) held in Cracow, Poland, 10-12 September, 1973 / edited by M.S. Longair.
Confrontation of cosmological theories with observational data : symposium no. 63 (Copernicus Symposium II) held in Cracow, Poland, 10-12 September, 1973 / edited by M.S. Longair.