Amino acids in Precambrian sediments: an assay.
D000596:Amino Acids / Q000032:analysis*; D001315:Australia; D002170:Canada; D002849:Chromatography, Gas; D055593:Geological Phenomena; D005844:Geology; D010163:Paleontology; D012987:Soil; D013019:South Africa
D000596:Amino Acids; D012987:Soil