Periods related to 273 months or 22-3/4 years
By: by C. G. Abbot.
Series: Smithsonian miscellaneous collections -- v. 134, no. 1; Publication -- 4265; Publication (Smithsonian Institution) -- 4265.
Publisher: Smithsonian Institution
Published: 1956
Place of publication: Washington
Language: eng
Number of pages: 17
Subjects: Solar radiation.
Notes: At head of title: Roebling fund.

Bibliographical footnotes.