:proceedings of a symposium in honour of G. Lemaaitre fifty years after his initiation of big-bang cosmology, Louvain-la-Neuve, Belgium, 10-13 October 1983
/ edited by A. Berger
Dordrecht ;Boston
: D. Reidel Pub. Co. ;Hingham, MA :Sold and distributed in the U.S.A. and Canada by Kluwer Academic Publishers,