In the Library of the Catholic University of Lublin fifty seven letters and correspondence cards which Stefania Skwarczyńska sent to Czesław Zgorzelski between the years 1948–1984 are kept. They are a trace of professional contacts between scholars — documenting in an aspectual way Polish scientific life. Letters. although in a private form. https://allfixelectricales.shop/product-category/divertor-to-pump-hose/