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Periodical. Halpern, Berthold, J. W. Westley, Ingilt Von Wrendenhagen, and Joshua Lederberg. "Optical Resolution of D,L Amino Acids by Gas Chromatography and Mass Spectrometry." Biochemical and Biophysical Research Communications 20, 6 (1965): 710-714. Article. 5 Images.. Biochemical and Biophysical Research Communications. Lederberg UI. P130