read_bibliography	import bibliography
write_bibliography	export bibliography
find_duplicates	identify duplicated references within a data.frame
extract_unique_references	pull out one example of each unique reference
make_dtm	construct a document term matrix from a data.frame
run_topic_model	wrapper function to topicmodels::LDA and related methods
screen_duplicates	interactive duplicate detection
screen_titles	screen articles by title
screen_abstracts	screen articles by abstract
screen_topics	draw an interactive plot of bibliographic data