Title: Kratki upŭtvanii͡a︡ i primeri za izchisli͡a︡vane ikonomicheskii͡a︡ efekt na vnedreni izobretenii͡a︡, rat͡s︡ionalizat͡s︡ii i ikonomicheski efektivni predlozhenii͡a︡
Subjects: Economic aspects of Technological innovations, Problems, exercises, Technological innovations