scholarly journals Relative efficiency of pigment and horny layer thickness in protecting the skin of Europeans and Africans against solar ultraviolet radiation*

1955 ◽  
Vol 127 (2) ◽  
pp. 236-246 ◽  
Author(s):  
M. L. Thomson
2003 ◽  
Vol 78 (6) ◽  
pp. 603 ◽  
Author(s):  
A. Oppenrieder ◽  
P. Hoeppe ◽  
P. Koepke ◽  
J. Reuder ◽  
J. Schween ◽  
...  

Science ◽  
1993 ◽  
Vol 259 (5094) ◽  
pp. 534-535
Author(s):  
Barbara B. Prézelin ◽  
Raymond C. Smith

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