Location service
It may be more practical for some readers to use books and periodicals at the library which holds them rather than request them on interlibrary loan. For periodicals, you may refer readers on the basis of the Nassau-Suffolk Union List of Serials. Please check the list of participating libraries in the front of volume 1 which notes some limitations of public access to materials in certain libraries.
For monographs, call LILRC and ask for a check of a few libraries in the microfilms of card catalogs to get locations for needed items.