- Autobiographies & memoirs
- Letters or correspondence
- Diaries
- Historical newspapers
- Documentary films & photographs
- Speeches (audio-visual or printed)
- Oral histories & interviews (audio-visual or printed transcripts)
- Unpublished government records & published government reports
- Ethnographic surveys & case studies
- Travellers’ accounts & descriptions
- International organization & national NGO reports based on field investigations
- Census & demographic data, statistical reports, & other data sets
RECOMMENDATION: Routinely search & read articles in the back issues of journals, especially: