AGRICOLA contains citations to journal articles, extension documents, government reports, books, theses, audiovisual materials, and patents back to 1970. It includes information about U.S. parks and recreation.
GreenFILE indexes popular and scholarly journals, reports, and government documents about the human impact on the environment. It includes citations to agriculture, education, health, law, and technology materials. Dates of coverage vary.
InvasivespeciesInfo.gov is managed by NISIC at NAL. This site uniquely serves as an “all-taxa” portal for invasive species information and serves as a reference and educational gateway to information, organizations, and services about invasive species.