By Willson Robert   in Solar Physics

ISSN:0038-0938|227|2|311-326

Springer Publishing Company ‎(2005)‎

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By Kardous Chucri   Willson Robert   in Journal of Occupational and Environmental Hygiene

ISSN:1545-9624|1|7|456-462

Taylor & Francis Ltd‎(2004)‎

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