United States. Internal Revenue Service.

• Business expenses
• Federal tax regulations, 1989
• Internal revenue manual
• Internal security inspector
• IRM 7.8.2
• IRS examination technique handbook for estate tax examiners
• Package for the special enrollment examination
• Production of vinegar by the vaporizing process
• Self-employment tax
• Small business tax workshop
• Tax withholding and estimated tax
• The factor evaluation system and you