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Science Paper
Vol. 238, Issue 8, 1940
August 01, 1940 EDT
Periodicity in Terrestrial Processes
Johannes Herman Frederik Umbgrove
,
Earth sciences
•
https://doi.org/10.2475/ajs.238.8.573
American Journal of Science
Umbgrove, J. H. F. (1940). Periodicity in terrestrial processes.
American Journal of Science
,
238
(8), 573–576.
https://doi.org/10.2475/ajs.238.8.573
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