Proceedings of IAU Symposium No. 53 held in Boulder, Colorado, 21-26 August 1972

The Equation of State of Matter at Sub-Nuclear Density.- Equation of State at Densities Greater than Nuclear Density.- Variational Method for Dense Systems.- Properties and Synthesis of Heavy Nuclei and Properties of Neutron Star Matter.- 'Statistical Bootstrap' Equation of State for Cold Ultra-Dense Matter.- A Simple Equation of State of Matter at Super-Nuclear Densities.- Pions in Neutron Star Matter.- Hypercollapsed Nuclear Matter.- Matter in Superstrong Magnetic Fields.- Quantum Crystals in Neutron Stars.- Superfluidity in Neutron Stars.- Phase Diagram of a Charged Bose Gas (Abstract Only).- Superluminal Sound and Ferromagnetic Transition in the Zeldovich Model.- Supernovae and Neutron Stars.- Neutron Star Structure from Pulsar Observations.- Cooling of Dense Stars.- Pulsar Observations and Neutron Star Models.- Hadron Star Models.- Differential Rotation in Degenerate Stars.- Continuum Polarization in Magnetic White Dwarfs.- Polarized Radiation from White Dwarfs and Atoms in Strong Magnetic Fields.- Matter-Antimatter Separation and the Antimatter Problem in Cosmology.- Quasar Counts and the Lagging Core Model ('White Holes').- Concluding Remarks.