The Columbia University Libraries catalog allows for faceted searches. One very useful facet is the use of Library of Congress Subject Headings. To search by LCSH, select "catalog" from the left (Search Source) drop-down menu, and select "subject" from the right drop-down menu in CLIO. LCSH headings can also be quite useful for searches in WorldCat. Searching by call number range can also be quite useful. The CLIO advanced search interface allows for many permutations of different search strategies.
The Columbia University Library catalog allows for searches by call number range. Here are a few examples: