标题：Directory of Scientific Directories; A World Guide to Scientific Directories, Including Medicine, Agriculture, Engineering, Manufacturing and Industrial Directories
摘要：This list of directories is divided geographically by continent, with special divisions of International and Polar Regions. It is subdivided alphabetically by country, and within each subdivision arrangement is according to seven subject groups: Physical Sciences, Mathematics, and Aerospace; Earth Sciences and Meteorology; Biological Sciences and Anthropology; Medicine, Public Health, and Safety; Agriculture, Forestry, and Fisheries; and Engineering, Materials, Manufacturing and Industrial.
