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RT @USGS: [PUB] 'Classic' USGS Publication. The composition of the Earth's crust Professional Paper 127 By: F.W. Clarke and H.S. Washington…
RT @USGS: [PUB] 'Classic' USGS Publication. The composition of the Earth's crust Professional Paper 127 By: F.W. Clarke and H.S. Washington…
RT @USGS: [PUB] 'Classic' USGS Publication. The composition of the Earth's crust Professional Paper 127 By: F.W. Clarke and H.S. Washington…
RT @USGS: [PUB] 'Classic' USGS Publication. The composition of the Earth's crust Professional Paper 127 By: F.W. Clarke and H.S. Washington…
The composition of the Earth's crust: A classic USGS Publication https://t.co/PeITss58cQ via @USGS_Pubs