Description based on: 2006; title from title screen (viewed on Jan. 26, 2007).
Mode of access: Internet at the IRS web site. Address of latest issue as of 1/26/07: http://www.irs.gov/pub/irs-pdf/p600.pdf; current access available via PURL.
Available also on CD-ROM: United States. Internal Revenue Service. Tax products CD-ROM.