LOCKYER SIR T. NORMAN, "Simultaneous Solar and Terrestrial Changes," Nature, v. 69, 1904, pp. 351-357.
HANN J., "Handbuch der Klimatologie," 3d ed., vol. i, Stuttgart, 1908, pp. 354 et seq.
HANN J., "Handbook of Climatology," 2d ed., translated by
R. DeC. Ward, New York, 1903, p. 404 et seq.
Questia, a part of Gale, Cengage Learning. www.questia.com
Book title: Descriptive Meteorology.
Contributors: Willis L. Moore - Author.
Publisher: D. Appleton & Company.
Place of publication: New York.
Publication year: 1910.
Page number: 45.
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