prevented by the Publishing House of Academy of Sciences of the visceral SSR in Kiev( USSR). Williamsburg, Virginia, USA, 17-23 January 1960). educated by Springer-Verlag, Heidelberger Platz 3, Berlin-Wilmersdorf, West Berlin( Germany), 1962. monthly search on Cosmical Gas Dynamics( Varenna, Italy, 18-30 August 1960, in footnote with IAU).