The big bang and Georges Lemaitre : proceedings of a symposium in honour of G. Lemaitre fifty years after his initiation of big-bang cosmology, Louvain-la-Neuve, Belgium, 10-13 October 1983 - Lemaitre, Georges, 1894-; Berger, A., (Andre), 1942- (D.Reidel Publishing Company, 1984)