✦ LIBER ✦

ILLINOIS : Revised September 1991

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

IGRF, 1991 revision

✍ Langel, R. A. 📂 Article 📅 1992 🏛 American Geophysical Union 🌐 English ⚖ 368 KB

PENNSYLVANIA : Revised November 1991

📂 Article 📅 1992 🏛 Elsevier Science ⚖ 88 KB

OHIO : Revised November 1991

📂 Article 📅 1992 🏛 Elsevier Science ⚖ 75 KB

VIRGINIA : Revised November 1991

📂 Article 📅 1992 🏛 Elsevier Science ⚖ 105 KB

9 September 1991

✍ Robert D. Fouchaux 📂 Article 📅 1992 🏛 National Council of Teachers of Mathematics ⚖ 425 KB

LOUISIANA : Revised 1984, Reviewed 1991

📂 Article 📅 1992 🏛 Elsevier Science ⚖ 81 KB