Abbot, C.G. ; Aldrich, L.B., - Smithsonian Pyrheliometry Revised: Smithsonian Miscellaneous Collections, Volume 60, Number 18.

Washington, D.C., Smithsonian Institution, 1913. Trade Paperback., Vg- in Wraps. Offprint Material. Stapled Booklet. Pages: 7. Pages Uncut at Head. Faint Edgewear. Stamp on Front Cover.

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