.
Копировать в буфер
Pashkevich , N. V. (1987) "Economic Efficiency of Geological Exploration Works and the Main Directions of Its Increase",
Journal of Mining Institute
, 114, pp. 3-9. Available at: https://pmi.spmi.ru/pmi/article/view/10384 (Accessed: 5 December 2025).
Copy to clipboard