Reviews of topical problems

M.S. Khaikin “Magnetic surface levels” Sov. Phys. Usp. 11 785–801 (1969)

G.R. Khutsishvili “Spin diffusion and nuclear magnetic relaxation in a crystal containing a magnetic impurity” Sov. Phys. Usp. 11 802–815 (1969)

S.M. Stishov “Melting at high pressures” Sov. Phys. Usp. 11 816–830 (1969)

V.Ya. Frenkel’ “Fiftieth anniversary of the A. F. Ioffe Physicotechnical institute, USSR Academy of sciences (Leningrad)” Sov. Phys. Usp. 11 831–854 (1969)

N.G. Basov, V.S. Letokhov “Optical frequency standards” Sov. Phys. Usp. 11 855–880 (1969)

A.F. Volkov, Sh.M. Kogan “Physical phenomena in semiconductors with negative differential conductivity” Sov. Phys. Usp. 11 881–903 (1969)

New instruments and measurement methods

N.S. Shestov, E.O. Fedorova, V.F. Zakharenkov, N.A. Stavitskaya “Measurement of Fourier spectra of two-dimensional functions” Sov. Phys. Usp. 11 904–915 (1969)

Personalia

S.T. Belyaev, V.A. Sidorov, B.V. Chirikov “Gersh Itskovich Budker (in honor of his 50th birthday)” Sov. Phys. Usp. 11 916–918 (1969)

S.A. Akhmanov, F.V. Bunkin, V.G. Veselago, L.I. Gudzenko, Yu.A. Kravtsov, M.L. Levin, I.L. Fabelinskii, R.V. Khokhlov “Sergeĭ Mikhaĭlovich Rytov (in honor of his 60th birthday)” Sov. Phys. Usp. 11 919–920 (1969)

M.G. Veselov, G.F. Drukarev, Yu.V. Novozhilov “Vladimir Aleksandrovich Fock (in honor of his 70th birthday)” Sov. Phys. Usp. 11 921–923 (1969)