Columbia University [In one year, Columbia professors wrote this many books.]

Columbia University [In one year, Columbia professors wrote this many books.]

Columbia University [In one year, Columbia professors wrote this many books.]

Columbia University [Students in a professor's office.]

Columbia University [Sculpture professor.]

Columbia University [Sculpture professor.]

Columbia University [Sculpture professor.]

Columbia University [Sculpture professor.]

Columbia University [Three professors.]

Columbia University [Science professor.]

Columbia University [Sculpture professor.]

Columbia University [Science professor.]

Columbia University [Sculpture professor.]

Columbia University [Sculpture professor.]

Columbia University [Sculpture professor.]

Columbia University [Professor teaching a class.]

Columbia University [Professor teaching a class.]

Columbia University [Professor talking with student.]

Columbia University [Professor teaching a class.]

Columbia University [Professor teaching a class.]