1. Analysis of organic microparticulates in aerosols;Alfheim,1980
2. An Atlas of Airborne Pollen Grains and Common Fungus Spores of Canada;Bassett,1978
3. Polycyclic aromatic compounds in nature;Blumer;Sci. Am.,1976
4. Indigenous and petroleum-derived hydrocarbons in a polluted sediment;Blumer;Mar. Pollut. Bull.,1972
5. Distributions of n-paraffins as a clue to recognition of source beds;Bray;Geochem. Cosmochim. Acta,1961