1. Goldberg, E.D. BC in the Environment: Properties and Distribution; J. Wiley: New York, 1985.
2. Little, R.J.A.; Rubin, D.B. Statistical Analysis with Missing Data, 2nd ed.; Wiley: Hoboken, NJ, 2002.
3. 2003 Baltimore Central Business District (CBD) Trip Characteristics; Report Task Report 04-2; Transportation Planning Division; Baltimore Metropolitan Council: Baltimore, MD, 2003.
4. The Aethalometer; Report 2003.04; Magee Scientific: Berkeley, CA, 2003.
5. Hansen, T. Template for Preparing Aethalometer 24-Hour Data Charts: Version for AE16 Single-Channel Instruments; Magee Scientific: Berkeley, CA, 1999.