Reviews of topical problems

D.A. Varshalovich “Spin states of atoms and molecules in the cosmic medium” 13 429–437 (1971)

I.M. Dremin, I.I. Roizen, D.S. Chernavskii “The importance of inelastic processes at high energies and the theory of fireballs” 13 438–460 (1971)

V.M. Rudyak “The barkhausen effect” 13 461–479 (1971)

Yu.L. Klimontovich “Problems of statistical theory of interaction of atoms with radiation” 13 480–494 (1971)

A.G. Kislyakov “Radioastronomical investigations in the millimeter and submillimeter bands” 13 495–521 (1971)

M.S. Dubovikov, Yu.A. Simonov “Decay of resonant states and determination of their quantum numbers” 13 522–543 (1971)

Personalia

N.A. Dobrotin, A.E. Chudakov “SERGEI NIKOLAEVICH VERNOV (on his sixtieth birthday)” 13 544–546 (1971)

L. Brekhovskikh, K.A. Naugol’nykh, G.A. Ostroumov “NIKOLAI NIKOLAEVICH ANDREEV (on his 90th Birthday)” 13 547–549 (1971)

Letters to the editors

Yu.P. Raizer “Letter to the editor” 13 550–550 (1971)