- Extent to which original field research was supplemented or replaced by the use of record
- Types of records utilized (e.g., archeological remains, unpublished documents, museum collections, census data, literary sources, earlier published materials)
- Techniques of analysis and criticism applied in assessing source materials, etc.
Outline of Cultural Materials. George P. Murdock, et al., eds. New Haven, Conn. Human Relations Area Files, Inc. 1961. xxv, 164 p.