All CU libraries currently provide users with online referencing services, and they help with literature searches. Some libraries are also involved in supporting e-learning at their faculties.
If you are looking for a particular book that would normally be physically available in your departmental library, you can check the University eBooks Portal to see whether the University has access to an electronic version. Likewise, you can look for available electronic periodicals at the eJournals Portal.
In regards to the current situation, all loans from CU libraries were extended until May 15, 2020 and overdue fees will not accrue during the period from March 11 to May 15, 2020.