Acta Astronautica, Volume 5, Nos. 11/12 Preface List of Papers Presented at the Sixth International Colloquium on Gasdynamics of Explosions and Reactive Systems, 22-26 August 1977 Photochemical Initiation of Gaseous Detonations Closed Theoretical Model of a Detonation Cell Initiation of Spherical Detonation in Hydrocarbon/Air Mixtures Explosion dans Fair de charges sphériques non confinées de mélanges réactifs gazeux Shock Waves in Water Foams Shock Sensitivity of Nitromethane with Well Defined Hot Spots Distribution Theoretical Studies of Shock-Initiated Detonations Cylindrical Heterogeneous Detonation Waves The Turbulent Combustion of a Propane-Air Mixture Combustion of Solid Materials in a Turbulent Gas Stream (In French) An Experimental Study of Flame Turbulence Blasting Methods to Improve Rock Fragmentation The Role of Viscosity of Solids in Microparticle Cratering Shock Tube Study of Boundary Layer Instability A Study of Detonation in Methane/Air Clouds Numerical Modeling of Unsteady Flame Propagation Propagation of a Flame Through a Stratified Charge Combustion Chamber Gasification Effects in the Heterogeneous Ignition of a Condensed Fuel by a Hot Gas Mass Transfer Interaction of Moving Particles in a Reactive Dispersive System The Influence of Pressure on Combustion IntensityComment Summary of discussion on explosive cloudsActa Astronautica, Volume 6, Nos. 3/4 A Study of Hydrogen Azide Detonation with Heat Transfer at the Wall The Ground Impulse Generated by a Plane Fuel-Air Explosion with Side Relief Propagation of a Laser-Supported Detonation Wave A Model for Spray Detonations Calculations of Detonation Waves in Gas-Droplet Systems Investigations of Chemical Reactions in a Turbulent Media Joint Probability Density Function in Turbulent Combustion Rock Breakage by Explosives Cavities and Gas Penetrations from Blasts in Stressed Rock with Flooded Joints On the Role of Stress Waves and Quasi-static Gas Pressure in Rock Fragmentation by Blasting Study of Condensed System Combustion Front by Mass-Spectrometry CO2 Vibrational Temperature Measurements in CO + N2O Gas-Dynamic Laser Change in the Shape of the Diffracting Shock Wave at a Convex Corner Unsteady Rectilinear Flows of a non-Homentropic Gas The Transition from Slow Burning to Detonation On the Modeling of Turbulent Reacting Flows in Furnaces and Combustion Chambers A Study of Flat Methane-Air Flames at Various Equivalence Ratios The Thermal Diffusion Factors of an Argon-Helium Mixture in the High Temperature Range (2000-4000K) Partial Equilibrium and Relaxation in a PlasmaActa Astronautica, Volume 6, Nos. 7/8 On Detonation Waves Supported by Diffusion Flames-II Dark Waves in Liquid Homogeneous Explosives with Unstable Detonation Front Initiation and Detonation Studies in Sensitized Nitromethane Relation of Chemical and Physical Processes in Two-Phase Detonations Flame Turbulence Studies On the Turbulence in Premixed Flames Shock Tube Ignition and Detonation Studies by Resonance (10.