As you find items relevant to your research, take note of the subject headings you'll find on each book's summary page. Using those will help you find similar relevant materials. Some useful subjects include:
Ballerinas
Ballet
Ballet dancers
Choreographers -- [Country] -- Biography
Choreography -- Philosophy
Dance
Dance -- Aesthetics
Dance -- Anthropological aspects
Dance -- Biography
Dance companies
Dance criticism
Dance -- History
Dance in literature
Dance notation
Dance -- Philosophy
Dance -- Production and direction
Dance -- Social aspects
Dance -- Study and teaching
Dancers
Dancers -- Biography
Dancing injuries
Labanotation
Modern dance -- Aesthetics
Modern dance -- Political aspects -- [Country] -- History
Modern dance -- Social aspects -- [Country] -- History
Modern dance -- [Country] -- History
Movement, Aesthetics of
Movement analysis
Movement notation
Movement, Psychology of
The print collection of dance materials is located on the 3rd floor of Lied Library.
Books about dance music can be found on the 4th floor of Lied Library.
Musical scores for dance music can be found in the Music Library.