✦ LIBER ✦

Contour blasting in driving mine shafts

✍ Scribed by Kh. I. Abramson

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

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✍ N. V. Pitak; E. A. Gin'yar; V. I. Levitanskii; G. Ya. Rutkovskii 📂 Article 📅 1968 🏛 Springer US 🌐 English ⚖ 652 KB