noun
reference library
A library where materials are consulted on-site and not lent out, or a library specializing in reference works.
この参考図書館では、貴重な資料を館内で閲覧できます。
At this reference library, you can view valuable materials inside the building.
図書館 is a general library, while 参考図書館 specifically refers to a reference library where materials are typically not available for borrowing.
Compound of 参考 (reference) and 図書館 (library).