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2. Studies in Paleobiochemistry;Abelson;Carnegie Inst. Wash. Year Book,1954
3. Organic constituents of fossils;Abelson;Geol. Soc. Amer. Mem.,1957
4. Geochemistry of organic substances: Researches in Geochemistry;Abelson,1959
5. Identification of derivatives of desoxyribonucleic acid in humic acid;Anderson;Soil Science,1958