Sommaire

Contents
International seminar on elementary excitation processes in crystals
Exact treatment of coherent and incoherent triplet exciton migration
p. 5-8
High intensity excitations in ionic compounds
p. 9-28
Revue of experiments with multiple photon transitions in organic crystals
p. 29-43
On the diameter-depth relationship of lunar craters
p. 45-57
Supplementary catalogue I of original and future comet orbits
p. 59-65
Anamorfoza ve Štěpánského nomogramech s unárním polem
p. 67-75