GRAVITATION, ASTROPHYSICS 
An upper limit on the density of gravitational radiation of extraterrestrial origin

387

The motion of charged radiating shells in the general theory of relativity and "friedmon" states

393

Selfsimilar motions in general relativity for a spherically symmetric reference system in special coordinates

399

Drift of particles in the field of a gravitational wave

402

NUCLEI, PARTICLES, AND THEIR INTERACTIONS 
The connection between various inclusive processes in quantum electrodynamics

405

ATOMS, SPECTRA, RADIATION 
Detachment of weakly bound electrons in slow collisions between atomic systems

410

Velocity distribution relaxation due to inelastic collisions

414

Influence of elastic collisions on nonlinear interference effects

419

lnvestigation of photocounting statistics without the use of perturbation theory

423

Spectroscopy within the radiative linewidth

429

Spectral exchange in collision broadening of rotational structure

433

Stationary stimulated Mandel'shtamBrillouin scattering in paramagnetic crystals under acoustic paramagnetic resonance conditions

440

Ruby breakdown by pulse trains and single ultrashort pulses

443

Selfaction of a bounded wave beam in nonlinear geometric optics (twodimensional problem)

447

PLASMA, GASES 
Nonstationary turbulence of parametrically unstable plasma

452

The modified decay of Langmuir waves

459

Radiative losses by argon plasma and the emissive model of a continuous optical discharge

463

lnvestigation of lowthreshold gas breakdown near solid targets by CO_{2} laser radiation

469

SOLIDS, LIQUIDS 
Equation of state of matter near the liquidvapor critical point

478

Phase transitions in twocomponent systems

480

Superconductivity in polycrystalline bismuth films

485

The Hubbard model for the transition metals and the anomalies in their specific heat and magnetic susceptibility

490

The effect of impurities on the change of the mechanical properties of metals in a superconducting transition

497

Ferromagnetic resonance in ironnickel single crystals

502

Nonlinear effects in the electric conductivity of point junctions and electronphonon interaction in normal metals

506

The theory of inhomogeneous tunnel junctions

514

Heterodyne reception of light by an injection laser

522

Homogeneous magnetic relaxation near secondorder phase transition

528

Magnetic phase transitions in antiferromagnetic NiCO_{3}

531

Conductivity of typell superconductors near the critical field H_{c2} for arbitrary mean free paths

538

Xray interferometer with narrow beam

542

Magnetically ordered state of twodimensional ferromagnets with anisotropy of the "easyplane" type

547

The electron configuration of the iron ions in the NiFe_{2x}Cr_{x}O_{4} ferrites

551

Theory of antiferromagnetic impurities in magnets

554

Interference of nuclear transitions in pure nuclear diffraction of 14.4keV gamma rays by hematite

562

Dependence of the resonant frequencies of antiferromagnets on the magnetic field, and antiferromagnetic resonance in CoF_{2}

565

Spontaneous magnetization and correlation functions in the Kagome lattice

570
