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Bergbau
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keywords:(Bergbau)
History of United States of America Assistance to Chile. A.I.D. and Predecessor Agencies 1943-1980
Potential Applications of Advanced Aircraft in Developing Countries
Review of Recent Accidents Involving Explosives Transport
Study of Design and Development of a Coal Injector for Coarse Slurry Transport
Use of Outer Planet Satellites and Asteroids as Sources of Raw Materials for Life Support Systems