Drum, W. M. (1905). The pioneer forecasters of hurricanes. Published for the Observatory of Belén ; Stormont & Jackson.
Chicago-referens (17:e uppl.)Drum, Walter M. The Pioneer Forecasters of Hurricanes. Havana, Cuba : Washington, D.C.: Published for the Observatory of Belén ; Stormont & Jackson, 1905.
MLA-referens (8:e uppl.)Drum, Walter M. The Pioneer Forecasters of Hurricanes. Published for the Observatory of Belén ; Stormont & Jackson, 1905.
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