کتاب های Wolfgang J. T. Spyra
![Environmental Security and Public Safety: Problems and Needs in Conversion Policy and Research after 15 Years of Conversion in Central and Eastern Europe](http://cdn.ketabkoo.com/covers/1/142743-n.jpg)
Environmental Security and Public Safety: Problems and Needs in Conversion Policy and Research after 15 Years of Conversion in Central and Eastern Europe
Alexander Döring Dipl. Eng. (auth.), Wolfgang Spyra, Michael Katzsch (eds.), 2007![The Conversion of Liquid Rocket Fuels](http://cdn.ketabkoo.com/covers/4/439411-n.jpg)