| Issue 1 | 1 | 
            
              | Article: Résonance de spin électronique de Gd et d'Eu dans les supraconducteurs SnMo6S8 et PbMo6S8 en poudre | 1 | 
            
              | Article: On the kinetics of condensation through homogeneous nucleation | 85 | 
            
              | Article: An approach to metastability in some ferromagnetic systems | 106 | 
            
              | Article: Three particle bound states in even λP(φ)_2 models | 131 | 
            
              | Issue 2 | 191 | 
            
              | Article: Bounds on Ising partition functions. I | 191 | 
            
              | Article: Bounds on Ising partition functions. II, Application to frustration | 201 | 
            
              | Article: General relativistic effects on the cooling of neutron stars | 214 | 
            
              | Association News: Bericht über die Frühjahrstagung der Schweizerischen Physikalischen Gesellschaft, Neuchâtel, 9. + 10. April 1981 | 219 | 
            
              | Issue 3 | 341 | 
            
              | Article: Analyticity and Borel-summability of the perturbation expansion for correlation functions of continuous spin systems | 341 | 
            
              | Article: Dispersion relations for Feynman graphs | 364 | 
            
              | Article: (Quasi-) momentum, (quasi) angular momentum and spin for condensed media | 383 | 
            
              | Article: Phenomenological expression for densities and currents in condensed media and Umklapp processes | 395 | 
            
              | Article: Vacuum polarization test and search for direct muon-hadron interaction from muonic X-rays | 406 | 
            
              | Article: 50 years ago Pauli invented the neutrino | 411 | 
            
              | Article: The vacuum structure of the Schwinger model and its external field problem | 419 | 
            
              | Article: General features of total hadron-nucleus reaction cross sections | 432 | 
            
              | Article: Elastic scattering of α particles from 16O near the Coulomb barrier | 439 | 
            
              | Article: Aharonov-Bohm scattering : comment on a paradox | 444 | 
            
              | Article: Electromagnetic properties of the pion in the dressed quark model | 447 | 
            
              | Article: Spin relaxation and dissipative Schrödinger like evolution equations | 457 | 
            
              | Issue 4 | 471 | 
            
              | Article: The electronic structure of hydrogen in elemental metals in the light of muon spin rotation (μSR) investigations | 471 | 
            
              | Article: The (n, d) differential elastic cross section at 2 MeV | 547 | 
            
              | Article: Direct measurement of the muonium hyperfine frequencies in quartz | 552 | 
            
              | Article: Effect of the ponderomotive force in interaction of an amplitude modulated rf-field with a nonuniform plasma | 561 | 
            
              | Article: Formation volume and energy of a vacancy : lattice distortion and non-linear screening in aluminium | 570 | 
            
              | Association News: Rapport de la réunion d'automne de la Société Suisse de Physique (SSP), Davos, 24-26 septembre 1981 | 580 | 
            
              | Table of Contents | 659 | 
            
              | Index: Author's index = Autorenregister = Table des auteurs | 668 |