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No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
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![Identified! [Charles Greeley Abbot, astrophysicist and Secretary of the Smithsonian, with his device: a silver-disc pyrheliometer which measures direct beam solar irradiance] (LOC)](http://farm1.static.flickr.com/765/21899747561_754c9fc5f9_m.jpg)
Identified! [Charles Greeley Abbot, astrophysicist and Secretary of the Smithsonian, with his device: a silver-disc pyrheliometer which measures direct beam solar irradiance] (LOC)
by The Library of Congress
by The Library of Congress
No known copyright restrictions(著作権制限なし)

Glass negatives of The Rocks, Sydney, ca. 1890-1910, by William Joseph Macpherson
by State Library of NSW
by State Library of NSW
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
1,561件~1,620件 (全 189,277件)