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2. Isotopic analysis of lead by the mass spectrometer;Decheylard;J. Chim. Phys.,1953
3. Isotopic analyses of anomalous leads;Farquhar;R. Soc. Canada, Trans.,1954
4. Minor elements in some sulphide minerals;Fleischer;Econ. Geol.,1955
5. An estimate of the age of the Earth;Holmes;Nature,1946