✦ LIBER ✦

The Development of a Source for Standard Wave-Lengths and the Importance of their Fundamental Values

✍ Scribed by Charles E. St. John and Harold D. Babcock

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

A Light Source for the Primary Standard

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✍ SIEGBAHN, MANNE; SöDERMAN, MARTIN 📂 Article 📅 1932 🏛 Nature Publishing Group 🌐 English ⚖ 323 KB

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