Title: Nat͡sionalna nauchno-tekhnicheska konferent͡sii͡a s mezhdunarodno uchastie "Ikonomii͡a na energiĭno-surovinni resursi chrez vnedri͡avane na novi tekhnologii, materiali i zamestiteli v promishlenostta, stroitelstvoto i transporta"
Subjects: Congresses, Conservation of natural resources, Energy conservation, Technological innovations