| Primary Sources | Secondary Sources |
| Market research and testing, technical studies and investigations, drawings, designs, models, memorandums and letters, computer data, company statistics, consumer surveys, annual reports | Discussion of the business world in newspapers, business magazines, journals, government documents, and books. |
| Primary Sources | Secondary Sources |
| Pilot studies, term projects, sampling results, tests and test data, surveys, interviews, observations, statistics, computer data, lesson plans, syllabi, class assignments | Analysis and evaluation of educational experimentation in journals, pamphlets, books, and reports. |
| Primary Sources | Secondary Sources |
| Sculptures, architectural models or drawings, buildings or structures, letters, motion pictures or films, organizational records, paintings, personal accounts, photographs, prints, sketch books, lyrics, scores, sound recordings, music, scripts, production notes | Evaluations in journal articles, critical reviews, biographies, and critical books about the authors and their works. |
| Primary Sources | Secondary Sources |
| Speeches, writings by presidents and others, the Congressional Record, diaries, narratives, documents written by historical figures; government reports, letters, press releases, official records of legislative groups, interviews, election data, public opinion polls or surveys, treaties or international agreements; diaries, interviews, oral histories, personal accounts, news reports, artifacts, maps, organizational records, photographs, works of art | Newspaper reports, news magazines, political journals and newsletters, journal articles, history books, dictionaries, encyclopedias, textbooks, journal articles, biographies, commentaries on a speech, analyses of election data |
| Primary Sources | Secondary Sources |
| Codes, statutes, court opinions, legislative reports, agency rules and regulations, presidential orders | Legal encyclopedias, journal articles, law reviews, treatises, dictionaries, attorney practice materials |
| Primary Sources | Secondary Sources |
| Novels, poems, plays, short stories, letters, diaries, manuscripts, autobiographies, interviews, personal accounts | Journal articles, reviews, biographies, critical books about writers and their works. |
| Primary Sources | Secondary Sources |
| Psychological tests; studies (case studies, follow-up studies, longitudinal studies, treatment outcome studies); clinical case reports; experimental replications; findings from surveys and questionnaires; reports of social workers, psychiatrists, and lab technicians; interviews; oral histories; organizational records; artifacts; statistical data; field notes; site reports; fossils; photographs | Commentary and evaluations in reports, documents, journal articles, and books. |
| Primary Sources | Secondary Sources |
| Tools and methods, experiments, findings from tests and experiments, observations, discoveries, test patterns, field notes, specimens, research reports, maps, geological surveys, patents, schematic drawings, technical reports, models | Interpretations and discussions of test data, found in journals and books. |