The Toxicology and Environmental Health Information Program (TEHIP) at the US National Library of Medicine has developed an Internet gopher offering free access to national and international information resources and convenient connection to NLM's MEDLARS online databases. Included in the TEHIP gopher are a variety of publications (e.g., the bibliographic publication produced by TEHIP: ALTERNATIVES TO THE USE OF LIVE VERTEBRATES IN BIOMEDICAL RESEARCH AND TESTING) and direct connections to many relevant information sources from national and international government groups and universities. Training modules and documentation for the MEDLARS toxicology databases, and a calendar of meetings and courses of interest to those working in the areas of toxicology, environmental health and medicine, and occupational health and medicine are also included.