Reviews of topical problems

M.I. Ryazanov “Bremsstrahlung and pair production at ultrahigh energies in condensed amorphous matter” 17 815–825 (1975)

A.M. Prokhorov, F.V. Bunkin, K.S. Gochelashvili, V.I. Shishov “Propagation of laser radiation in randomly inhomogeneous media” 17 826–847 (1975)

L.I. Gudzenko, L.A. Shelepin, S.I. Yakovlenko “Amplification in recombining plasmas (plasma lasers)” 17 848–863 (1975)

A.I. Akhiezer, M.P. Rekalo “Electric charge of elementary particles” 17 864–874 (1975)

B.M. Bolotovskii, S.N. Stolyarov “Current status of the electrodynamics of moving media (infinite media)” 17 875–895 (1975)

V.E. Zakharov, V.S. L’vov, S.S. Starobinets “Spin-wave turbulence beyond the parametric excitation threshold” 17 896–919 (1975)

Physics of our days

A.M. Kosevich “How a crystal flows” 17 920–930 (1975)

V.N. Sintsov, A.F. Zapryagaev “Aperture synthesis in optics” 17 931–941 (1975)

From the current literature

V.A. Bushuev, R.N. Kuz’min “X-ray lasers” 17 942–949 (1975)

From the history of physics

I.M. Frank “Some further memories of S. I. Vavilov” 17 950–952 (1975)

S.N. Rzhevkin “Memories of S. I. Vavilov” 17 953–954 (1975)

N.N. Malov “A few words about S. I. Vavilov” 17 954–955 (1975)

G.P. Faerman “Sergei Ivanovich Vavilov” 17 955–958 (1975)

A.A. Lebedev “Fragments from recollections of S. I. Vavilov” 17 958–959 (1975)

N.A. Smirnova “S. I. Vavilov in the Presidium of the USSR Academy of Sciences” 17 960–961 (1975)

Methodological notes

N.A. Leontovich “Maximum efficiency of direct utilization of radiation” 17 963–964 (1975)

Personalia

V.I. Gol’danskii, Ya.B. Zel’dovich, M.A. Kozhushner, V.N. Kondrat’ev, I.M. Lifshitz, B.V. Novozhilov, N.N. Semenov, N.D. Sokolov, V.L. Tal’roze, Yu.B. Khariton “Aleksandr Solomonovich Kompaneets (obituary)” 17 965–966 (1975)