From the ediorial board

“Seventieth anniversary of Soviet physics” Sov. Phys. Usp. 30 921–926 (1987)

Reviews of topical problems

V.S. Lisitsa “New results on the Stark and Zeeman effects in the hydrogen atom” Sov. Phys. Usp. 30 927–951 (1987)

V.G. Arkhipkin, A.K. Popov “Nonlinear optics and transformation of light in gases” Sov. Phys. Usp. 30 952–976 (1987)

Physics of our days

Ya.B. Zel’dovich, A.S. Mikhailov “Fluctuation kinetics of reactions” Sov. Phys. Usp. 30 977–992 (1987)

From the history of physics

I.Kh. Lemberg, V.O. Naidenov, V.Ya. Frenkel’ “The cyclotron of the A. F. loffe Physico-Technical Institute of the Academy of Sciences of the USSR (on the fortieth anniversary of its startup)” Sov. Phys. Usp. 30 993–1006 (1987)

Methodological notes

G.T. Zatsepin, Yu.A. Nechin, G.B. Khristiansen “Use of the magnetic induction of iron in cosmic-ray and high-energy physics” Sov. Phys. Usp. 30 1007–1008 (1987)

Meetings and conferences

V.V. Zheleznyakov, V.V. Kocharovskii, V.V. Kocharovskii “Cyclotron superradiance in a plasma as a classical analog of Dicke superradiance” Sov. Phys. Usp. 30 1009–1010 (1987)

V.Yu. Trakhtengerts “Ion cyclotron maser and the dynamics of the magnetospheric ring current” Sov. Phys. Usp. 30 1010–1011 (1987)

V.V. Zaitsev, E.Ya. Zlotnik, V.E. Shaposhnikov “Cyclotron mechanism of decameter radio emission of Jupiter” Sov. Phys. Usp. 30 1011–1011 (1987)

Book reviews

A.A. Tseitlin “Unified string theories” Sov. Phys. Usp. 30 1012–1013 (1987)

V.G. Terziev “Physical crystallography” Sov. Phys. Usp. 30 1013–1013 (1987)