@Book{198558937,
author="Freytag, Helmuth",
editor="M{\"u}ller, Harald",
title="Werkstoffe der chemischen Apparate",
year="1939",
edition="3. Auflage",
publisher="Verlag Chemie G.m.b.H.",
address="Berlin",
note="von Dr.-Ing. Helmuth Freytag",
language="German"
}