One of the families which I do descend from, is Kalech.
Other cities of which I do know already that they lived there is: Ustrzyki, Ulucz and apparently also Tarnobrzeg (Dinow).
There are some sources where you can get to the yizkor books, one such source is the yizkor Books Project on JewishGen (http://www.jewishgen.org/yizkor/). That project’s goal as stated on their site is
Our goal is to facilitate access to Yizkor Books and the information contained in them
Another great source is the online repository of scanned yizkor books on the website of the Dorot Jewish Division at the New york Public Library: http://yizkor.nypl.org.
The goal of the Dorot Jewish Division as stated on their website is:
The Dorot Jewish Division is responsible for administering, developing and promoting the exploitation of one of the world’s great collections of Hebraica and Judaica. Reference and research services are available in a dedicated Jewish studies reading room on the first floor of the Library’s landmark Stephen A. Schwarzman Building. Contact us.
Primary source materials are especially rich in the following areas: Jews in the United States, especially in New York in the age of immigration; Yiddish theater; Jews in the land of Israel, through 1948; Jews in early modern Europe, especially Jewish-Gentile relations; Christian Hebraism; antisemitism; and world Jewish newspapers and periodicals of the nineteenth and twentieth centuries.
If you are interested in hardcopies of these yizkor books, you can Continue reading Yizkor books on Polish towns and cities