In addition, secondary sources have an added human element - the critic, reviewer, or performer. At this level of interpretation, our appreciation of the material is based both upon the work itself, and the artist who render it for us. Tertiary sources of humanistic material include textbooks , introductions , popularizations , biographics , histories , and reference sources for the humanities. Researchers in the humanities prefer the monograph . One also notices a much wider time spread in the materials used.
Humanists tend to browse resources more than scientists.