1. 1. AQUIRE , Chemical Information System (on-line database), Version 1.6/3.0 (Chemical Information Systems, Inc. User Support Group at 800-CIS-USER, in Maryland: (410) 321-8440, 1985 ).
2. 2. CHEMTRACK (database, not directly accessible) . Searches and printouts are available free of charge by contacting: National Institute of Environmental Health Sciences, Toxicology Research and Testing Service (MD 18-01, P.O. Box 12233, Research Triangle Park, North Carolina 27709, (919) 541-3418).
3. 4. ENVIROFATE (on-line database) , Version 1.3/2.0 (Baltimore, Maryland, Chemical Information Systems, Inc. User Support Group at 800-CIS-USER, in Maryland: (410) 321-8440, 1984 ).
4. 5. GENETOX (on-line database) , Version 1.3/2.0 (Baltimore, Maryland, Chemical Information Systems, Inc., User Support Group at 800-CIS-USER, in Maryland: (410) 321-8440, 1984 ).