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Kington, John (1969) A century of cloud classification. Weather, 24. pp. 84-89. ISSN 0043-1656
Lamb, H.H. (1969) The new look of climatology. Nature, 223. pp. 1209-1215. ISSN 0028-0836
Wigley, Tom (1969) Cave microclimate: a note on moisture. Helictite, 7. pp. 43-49.