Reviews of topical problems

V.A. Lyubimov “Interaction of neutrons at high energies” Sov. Phys. Usp. 20 97–118 (1977)

B.M. Smirnov “Cluster ions in gases” Sov. Phys. Usp. 20 119–133 (1977)

M.D. Gabovich “Ion-beam plasma and the propagation of intense compensated ion beams” Sov. Phys. Usp. 20 134–148 (1977)

K.P. Belov, V.I. Sokolov “Antiferromagnetic garnets” Sov. Phys. Usp. 20 149–166 (1977)

Physics of our days

I.L. Rozental’ “Cosmic objects and elementary particles” Sov. Phys. Usp. 20 167–173 (1977)

Methodological notes

N.I. Kaliteevskii, V.S. Mikhalev, S.N. Pen’kov, V.A. Polishchuk, V.K. Prilipko “Lecture demonstrations for general physics course using television” Sov. Phys. Usp. 20 174–176 (1977)

L.M. Polyakov “Model of deformed crystalline structure” Sov. Phys. Usp. 20 176–177 (1977)