Not all newspapers have been digitized yet and in many cases there is no index available to figure out what date you need. Historical research often calls for you to request a roll of microfilm covering a certain time period of interest via interlibrary loan. In fact, not all newspapers have been microfilmed, so as a first step you might want to check FirstSearch WorldCat (or above) to see if another university has holdings for the period in question. Then submit an interlibrary loan request for the microfilm and start scrolling.
To locate books in other libraries when we either don't own them or our copy is checked out, use BLC WorldCat. Once you've found the book you want, use the BLC request form or ILLiad to request the book be delivered to Tisch. The book will be delivered to the Tisch Library circulation desk, within 2 to 5 days, and you will be notified via email on its arrival. There is no charge for this service.