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A contribution to the study of prehistoric man in Algeria, North Africa: Being a description of some excavations in the habitation site at Mechta el Arbi, Constantine, Algeria
Some characteristics of the R-curve and it use for evaluating the fracture toughness of aluminum alloys(O nekotorykh osobennostiakh R-krivoi i ee ispol'zovanii dlia otsenki soprotivleniia razrusheniiu aliuminievykh splavov)