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Utilization of ultra-violet rays in agriculture (e.g. to stimulate growth, counteract rickets in young animals and birds, promote egg-laying, etc.).

By: Cameron-Brown, Charles Alexander, 1900-, Cameron-Brown, Charles Alexander, 1900-.
Material type: materialTypeLabelBookSeries: Document (United Nations): E/ECE/210, E/ECE/EP/159Publisher: Geneva : United Nations Economic Commission for Europe, 1955Other title: Rural electrification [At head of title:].Subject(s): Livestock | Ultraviolet radiation -- Physiological effect. -- Ultraviolet radiation -- Physiological effect
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