Here's how to access the yizkor books in this guide.
Click "town name" or "other names" to view the Library catalog record for the book.
Click "NYPL Digital Collections" to view an online copy of the book.
Click "Yiddish Book Center" to read/download a PDF of the book on the Yiddish Book Center website.
The abbreviation "n.a." (not available) means that a digitized copy of the book is not available.
Why? About 15% of the Library's yizkor book collection is not digitized, usually for copyright and/or formatting reasons.
Use yizkor books in person in the Dorot Jewish Division: