The phrase "a library which" is correct and usable in written English.
It can be used when describing a specific library and providing additional information about it.
Example: "I visited a library which specializes in rare manuscripts and historical documents."
Alternatives: "a library that" or "a library where".
She worked in a library, which was "humdrum.
I stocked a library which stretched over two floors".
The stage resembles a reading room in a library, which is just what the theater used to be.
For instance they added a library, which holds the Babar books and lots and lots of critical theory.
Recent donations have enabled the school to build a library, which is starved of books, but there is no local postal service for American friends to send books.
Yeah, we had quite a good school library, it's just a shame that a lot of schools don't have libraries anymore and I can see that you do have a library which is great!
The apartments were, in effect, an afterthought to a plan for a new library, which was financed partly with government tax credits for affordable housing.
(Only 1600 transformants screened here, is it meaningful?) We demonstrated a large improvement with a small library, which we would argue is a positive.
However, Allpaths-LG explicitly requires a minimum of two libraries (a short library and a jumping library), which means it could not be run on the data used in this study.
You can be a fogey and design, say, a university library (which he has done, at Downing College, Cambridge), but not an airport or a hospital.
In the case of very large municipalities, library provision may be on a grand scale, including a reference library, which has many of the features associated with large research libraries.
