Authors: Lemaître, Georges --- Klein, Oskar --- Hoyle, Fred --- Gold, Thomas --- Wheeler, John Archibald --- et al. Schucking, Engelbert L. --- Heckmann, Otto Hermann Leopold --- Oort, Jan Hendrik --- Lovell, Bernard --- Hulst, H. C. van de --- Ambarcumân, Viktor Amazaspovič --- Morgan, William Wilson --- Conseil de physique Solvay.
Year: 1958 Publisher: Bruxelles : R. Stoops,