Authors: Bernštejn, Sergej Natanovič --- Fréchet, Maurice --- de la Vallée Poussin, Charles Jean --- Caronnet, Théodule --- Lindeberg, Jarl Waldemar --- et al. Saltykow, Nicolaï --- Gilbert, Philippe --- Decuyper, Marcel --- Merlin, E. --- Bouligand, Georges --- Clairin, J. --- Timmermans, M.
Publisher: S.l. : s.n.,