1. Transfer of resonance radiation in an infinite medium. I

   • D. I. Nagirner
   • V. V. Ivanov

   OriginalPaper Pages: 1 - 11

2. On a problem in nonlinear radiative transfer

   • N. B. Engibaryan

   BriefCommunication Pages: 12 - 14

3. The gravitational instability of anisotropic homogeneous solutions

   • A. G. Doroshkevich

   BriefCommunication Pages: 15 - 17

4. Model of an expanding superdense cosmical object

   • Yu. L. Vartanyan

   BriefCommunication Pages: 18 - 20

5. Detailed photometric and colorimetric studies of six spiral galaxies in Virgo

   • B. E. Markaryan
   • E. Ya. Oganesyan
   • S. N. Arakelyan

   OriginalPaper Pages: 21 - 38

6. The virial mass-luminosity ratio and the instability of different galactic systems

   • I. D. Karachentsev

   OriginalPaper Pages: 39 - 49

7. The variable star AG Dra

   • A. A. Boyarchuk

   OriginalPaper Pages: 50 - 56

8. Photoelectric observations of AG Dra in 1965

   • T. S. Belyakina

   OriginalPaper Pages: 57 - 59

9. On the interpretation of flare stars

   • L. V. Mirzoyan

   Brief Communications Pages: 60 - 61

10. The possibility of a change in the intensity of the radio emission from galactic sources

    • V. A. Sanamyan

    Brief Communications Pages: 62 - 64

11. The break in the radio emission spectrum of Cassiopeia A

    • V. G. Malumyan

    Brief Communications Pages: 65 - 66

12. The Doppler effect and the last resolvable line of the Balmer series

    • L. N. Kurochka

    Brief Communications Pages: 67 - 67