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1993

1992

Gadgil, Ashok J."Models of Radon Entry."Radiation Protection Dosimetry 45.1-4 (1992) 373 - 379. DOI
Schipper, Leon J, Ruth Steiner, and Stephen Meyers."Trends in Transportation Energy Use, 1970-1988: An International Perspective."Asilomar Conference on Transportation and Global Climate Change, 1991 (1992).

1991