The 11-year and 27-day solar periods in meteorology,
by H. Helm Clayton.
APA Citation
Clayton, H. Helm. (1940). The 11-year and 27-day solar periods in meteorology. City of Washington: Smithsonian Institution.
MLA Citation
Clayton, Henry Helm, 1861-1946. The 11-year And 27-day Solar Periods In Meteorology. City of Washington: Smithsonian Institution, 1940.
Warning: These citations may not always be complete (especially for serials).