✦ LIBER ✦

New method of construction of drop shafts

✍ Scribed by Yu. S. Smirnov; Yu. A. Bereznitskii

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Experience with the construction of unde

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✍ N. P. Belous 📂 Article 📅 1969 🏛 Springer 🌐 English ⚖ 263 KB

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✍ A. I. Baitsur; B. T. Tishchenko 📂 Article 📅 1968 🏛 Springer 🌐 English ⚖ 520 KB