The Roman catacombs and their martyrs /
Hertling, Ludwig,Freiherr von,1892-author.
Kirschbaum, Engelbert,1902-1970.,author.
Costelloe, M. Joseph,translator.
Originally published: Milwaukee : The Bruce Publishing Company, 1956.
First published in Austria under title: Die Römischen Katakomben und ihre Martyrer.
First published: Vienna : Verlag Herder, 1950.
Includes bibliographical references and index.