Final answer:
Investigators have access to four types of information sources when searching public records: general reference works, online catalogs and databases, periodical indexes, and secondary data which are analyzed through content analysis.
Step-by-step explanation:
When searching public records, there are four different types of information sources available to investigators which include:
- General reference works which provide background information and factual details about a topic.
- Online catalogs and databases which are key tools to locate books, articles, and other reference sources.
- Periodical indexes to find articles and periodical content related to the subject of your research.
- Content analysis of secondary data which involves a systematic approach to evaluating information relevant to the study.
To utilize these resources, one must follow systematic research methods such as interviews, field research, and secondary research. Additionally, recording and tracking information is vital, whether using digital tools or pen and paper, to ensure the gathered data is organized and source-credited for reference in your report.