Preface 
p. 0483

The solar EUV and X-rays as ionizing source for planetary atmospheres
p. 0485 | Dwivedi, B. N.

Solar wind as causative and coupling source of planetary atmospheres
p. 0493 | Singh, R. N.

Space physics: Achievements and prospects
p. 0501 | Hultqvist, Bengt

The atmospheres of the inner planets
p. 0512 | Taylor, F. W.

Planet Mercury
p. 0525 | Dollfus, Audouin

Venus and its ionosphere
p. 0538 | Upadhyay, Hari Om; Singh, R. N.

The ionosphere of Venus based on pioneer Venus measurements
p. 0547 | Brace, L. H.

Lightning on Venus confirmed
p. 0550 | Singh, R. N.; Russell, C. T.

The wave and plasma environments of Mars
p. 0562 | Grard, Rejean

Comparative study of electron fluxes, ionization rates, ion and electron densities due to photoelectron and magnetospheric electron interaction with the atmosphere of Mars
p. 0577 | Haider, S. A.

Elements of cometary aeronomy
p. 0583 | Crifo, J. F.

Results of the space missions to comet Halley
p. 0603 | Keller, H. U.

Brainstorming Session in the Area of 'Plant Taxonomy in Relation to Biodiversity'
p. 0612