Direct and indirect - Direct resources contain information. Indirect resources don't have the information but point you to the resources that do. Directory - Directories give brief information about people, organizations, companies, or institutions. Information may include addresses, phone numbers, fax numbers, email addresses, and web sites. Encyclopedia - An encyclopedia contains information about a broad range of topics or one special topic.
Entries are generally longer than in an almanac, directory, or dictionary.
Entries are in alphabetic order. Gazetteer - A list of geographical places and locations. Geographical resources - Information about the geography of the world, countries, regions, states, or cities. Atlases contain maps and other geographical information. A list just of geographical places and locations is called a Gazetteer.