TY - BOOK AU - Borghoff U M AU - Rodig P AU - Scheffczyk J AU - Schmitz Lothar TI - Long-term preservation of digital documents: principles and practices SN - 978-3-540-33639-6 U1 - 025.840285 PY - 2006/// CY - Berlin PB - Springer-Verlag KW - Digital preservation ER -