RT Journal Article SR Electronic T1 THE COLOR REACTION OF VITAMIN A ON ACID EARTHS JF Science JO Science FD American Association for the Advancement of Science SP 158 OP 158 DO 10.1126/science.102.2641.158-a VO 102 IS 2641 A1 MAYER, GERDA GERNSHEIM A1 SOBOTKA, HARRY YR 1945 UL http://science.sciencemag.org/content/102/2641/158.2.abstract AB