The sunspot period (with one plate)

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090 0 0 ‡aQB525 ‡b.C63 1939 A
090 ⊔ ⊔ ‡aQB525 ‡b.C63 1939 A
035 ⊔ ⊔ ‡a(OCoLC)3920209
100 1 ⊔ ‡aClayton, Henry Helm, ‡d1861-1946.
245 1 4 ‡aThe sunspot period ‡b(with one plate) ‡cby H. Helm Clayton.
260 ⊔ ⊔ ‡aWashington, ‡bSmithsonian Institution, ‡c1939.
300 ⊔ ⊔ ‡a18 p., 1 p. : ‡bill. (maps) diagrs., plates ; ‡c25 cm.
490 0 ⊔ ‡aSmithsonian miscellaneous collections ‡vv. 98, no. 2.
500 ⊔ ⊔ ‡aPublication 3526.
533 ⊔ ⊔ ‡aPhotocopy. Ann Arbor, Mich., University Microfilms International. 1979. 23 cm.
538 ⊔ ⊔ ‡aMode of access: Internet.
650 ⊔ 0 ‡aSunspots.
CID ⊔ ⊔ ‡a001677675
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DAT 1 ⊔ ‡a20170926090541.0 ‡b2023-11-11T18:35:11Z
DAT 2 ⊔ ‡a2023-11-11T18:30:02Z ‡b2017-06-08T22:30:02Z
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