SOI Bulletin: Summer 1993PDF Articles: Corporate Alternative Minimum Tax, 1987-1990PDF Corporations, 1990PDF Environmental Excise Taxes, 1991PDF Foreign Corporations with Income Effectively Connected with a U.S. Business, 1989PDF Nonfiler Profiles, Processing Year 1991PDF Nonresident Alien Estates, 1990PDF Self-Employed Nonfilers, 1988PDF Turning Administrative Systems Into Information SystemsPDF