21. Trapping of orbits in barred galaxies

22. On the stability of the asteroids

23. Solar magnetic fields and activity

24. The experimental curve of growth in function of different sets of oscillator strengths

25. Relations of solar activity indices

26. Increasing trend of flare activity before the proton flare april 30, 1976

27. Centimeter wavelength observations of active regions and flares with a few arc second resolution

28. A correlation between various indices of solar activity and solar cycles

29. Caractères météorologiques du climat, et activite solaire: quelques remarques

30. A suggested approach to research on the sun-weather problem

31. Observations of zodiacal light in Egypt and its variations

32. On the global size of Oort's cloud of cometary nuclei and their total number

33. Voyager encounters with Jupiter's magnetosphere: results of the low energy charged particle (LECP) experiment

34. The weather on Mars on the basis of the measurements carried out by the Vikings mission

35. On the origin of nebulae

36. On mass loss from stars