P-ISSN 0002-9599
E-ISSN 1945-452X
Vol. 238, Issue 8, 1940August 01, 1940 EDT
Periodicity in Terrestrial Processes
Periodicity in Terrestrial Processes
Johannes Herman Frederik Umbgrove,
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