To locate books about a specific person or topic, use the Subject Search in the OPAL Library Catalog. Books about a particular instrument may be found by searching for the instrument as a subject (e.g. harp):
The subject, harp, will list resources that discuss more than one or the entire family of instruments. Various sub-categories (can be used after the name of any instrument) provide access to more specific resources..
It is also possible to search for books that discuss a particular country or time period.
The following table outlines call numbers for materials on instruction & study for the harp.
| Harp | Call Number |
| General works |
MT 54 |
| Method books |
MT 542 |
| Studies & exercises (etudes) |
MT 545 |
| Orchestral techniques |
MT 546 |