Armbrust - eine Sportwaffe communications of the "van der waals-fund" Calculation of thermodynamic properties of nitrogen up to 3000 atm. between 0ÿê and 150ÿê / by A. Michels, H. Wouters and J. de Boer communications of the "van der waals-fund" Dielectric constant of nitrogen uo to 1000 atms. between 25ÿê C and 150ÿê C / A. Michels, A. Jaspers and P. Sanders Herstellung der Sprengstoffe : Nitroglyzerin, Dynamit, Sicherheitssprengstoffe u.a / A. Voigt